MESON Chess Problem Database
Problem Display
PID: 199973 (8/8/8/3p1N2/KQ3br1/2pP1k1B/2Npn1RP/3RB2n w - - 0 1)
Peake, JL
The Observer, 1947
(First published on Sun Feb 23 1947)
#2
10 + 8
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rxg2
- 2.Sh4#
- 1...Rg3
- 2.Sh4#
- 1...Rh4
- 2.Sxh4#
- 1...Rg5
- 2.Sh4#
- 1...Rg6
- 2.Sh4#
- 1...Rg7
- 2.Sh4#
- 1...Rg8
- 2.Sh4#
- 1...Bxh2
- 2.Qxg4#
- 1...Be3
- 2.Qxg4#
- 1...Bg3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bd6
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bc7
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 1...Shg3
- 2.Rf2#
- 1...Sc1
- 2.Scd4#
- 2.Sfd4#
- 1...Sg1
- 2.Scd4#
- 2.Sfd4#
- 1...Seg3
- 2.Scd4#
- 2.Sfd4#
- 1...Sd4
- 2.Scxd4#
- 2.Sfxd4#
- 1...dxe1Q
- 2.Sxe1#
- 1...dxe1S
- 2.Sxe1#
- 1...dxe1B
- 2.Sxe1#
- 1...dxe1R
- 2.Sxe1#
- 1...d4
- 2.Qb7#
- 1...Rxg2
- Tries
- 1.Ka3?
- 1...Rxg2
- 2.Sh4#
- 1...Bxh2
- 2.Qxg4#
- 1...dxe1Q
- 2.Sxe1#
- 1...dxe1S
- 2.Sxe1#
- 1...dxe1B
- 2.Sxe1#
- 1...dxe1R
- 2.Sxe1#
- 1...Rg3
- 2.Sh4#
- 1...Rh4
- 2.Sxh4#
- 1...Rg5
- 2.Sh4#
- 1...Rg6
- 2.Sh4#
- 1...Rg7
- 2.Sh4#
- 1...Rg8
- 2.Sh4#
- 1...Be3
- 2.Qxg4#
- 1...Bg3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bc7
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 1...Shg3
- 2.Rf2#
- 1...Sc1
- 2.Scd4#
- 2.Sfd4#
- 1...Sg1
- 2.Scd4#
- 2.Sfd4#
- 1...Seg3
- 2.Scd4#
- 2.Sfd4#
- 1...Sd4
- 2.Scxd4#
- 2.Sfxd4#
- 1...d4
- 2.Qb7#
- 1...Bd6!
- 1...Rxg2
- 1.Kb3?
- 1...Sd4+
- 2.Scxd4#
- 2.Sfxd4#
- 1...Rxg2
- 2.Sh4#
- 1...Bxh2
- 2.Qxg4#
- 1...dxe1Q
- 2.Sxe1#
- 1...dxe1S
- 2.Sxe1#
- 1...dxe1B
- 2.Sxe1#
- 1...dxe1R
- 2.Sxe1#
- 1...Rg3
- 2.Sh4#
- 1...Rh4
- 2.Sxh4#
- 1...Rg5
- 2.Sh4#
- 1...Rg6
- 2.Sh4#
- 1...Rg7
- 2.Sh4#
- 1...Rg8
- 2.Sh4#
- 1...Be3
- 2.Qxg4#
- 1...Bg3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bd6
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bc7
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 1...Shg3
- 2.Rf2#
- 1...Sg1
- 2.Scd4#
- 2.Sfd4#
- 1...Seg3
- 2.Scd4#
- 2.Sfd4#
- 1...d4
- 2.Qb7#
- 1...Sc1+!
- 1...Sd4+
- 1.Ka5?
- 1...Rxg2
- 2.Sh4#
- 1...Bxh2
- 2.Qxg4#
- 1...dxe1Q
- 2.Sxe1#
- 1...dxe1S
- 2.Sxe1#
- 1...dxe1B
- 2.Sxe1#
- 1...dxe1R
- 2.Sxe1#
- 1...Rg3
- 2.Sh4#
- 1...Rh4
- 2.Sxh4#
- 1...Rg5
- 2.Sh4#
- 1...Rg6
- 2.Sh4#
- 1...Rg7
- 2.Sh4#
- 1...Rg8
- 2.Sh4#
- 1...Be3
- 2.Qxg4#
- 1...Bg3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bd6
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 1...Shg3
- 2.Rf2#
- 1...Sc1
- 2.Scd4#
- 2.Sfd4#
- 1...Sg1
- 2.Scd4#
- 2.Sfd4#
- 1...Seg3
- 2.Scd4#
- 2.Sfd4#
- 1...Sd4
- 2.Scxd4#
- 2.Sfxd4#
- 1...d4
- 2.Qb7#
- 1...Bc7+!
- 1...Rxg2
- 1.Kb5?
- 1...Sd4+
- 2.Scxd4#
- 2.Sfxd4#
- 1...Rxg2
- 2.Sh4#
- 1...Bxh2
- 2.Qxg4#
- 1...dxe1Q
- 2.Sxe1#
- 1...dxe1S
- 2.Sxe1#
- 1...dxe1B
- 2.Sxe1#
- 1...dxe1R
- 2.Sxe1#
- 1...Rg3
- 2.Sh4#
- 1...Rh4
- 2.Sxh4#
- 1...Rg5
- 2.Sh4#
- 1...Rg6
- 2.Sh4#
- 1...Rg7
- 2.Sh4#
- 1...Rg8
- 2.Sh4#
- 1...Be3
- 2.Qxg4#
- 1...Bg3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bd6
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bc7
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 1...Shg3
- 2.Rf2#
- 1...Sc1
- 2.Scd4#
- 2.Sfd4#
- 1...Sg1
- 2.Scd4#
- 2.Sfd4#
- 1...Seg3
- 2.Scd4#
- 2.Sfd4#
- 1...d4!
- 1...Sd4+
- 1.Bg3?
- 1...Rxg3
- 2.Sh4#
- 1...Bxg3
- 2.Qxg4#
- 1...Sexg3
- 2.Scd4#
- 2.Sfd4#
- 1...Rh4
- 2.Sxh4#
- 1...Rg5
- 2.Sh4#
- 1...Rg6
- 2.Sh4#
- 1...Rg7
- 2.Sh4#
- 1...Rg8
- 2.Sh4#
- 1...Be3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bd6
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bc7
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 1...Sc1
- 2.Scd4#
- 2.Sfd4#
- 1...Sg1
- 2.Scd4#
- 2.Sfd4#
- 1...Sd4
- 2.Scxd4#
- 2.Sfxd4#
- 1...d4
- 2.Qb7#
- 1...Shxg3!
- 1...Rxg3
- 1.Rxd2?
- 1...Rxg2
- 2.Sh4#
- 1...Bxd2
- 2.Qxg4#
- 1...Bxh2
- 2.Qxg4#
- 1...Rg3
- 2.Sh4#
- 1...Rh4
- 2.Sxh4#
- 1...Rg5
- 2.Sh4#
- 1...Rg6
- 2.Sh4#
- 1...Rg7
- 2.Sh4#
- 1...Rg8
- 2.Sh4#
- 1...Be3
- 2.Qxg4#
- 1...Bg3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bd6
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bc7
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 1...Shg3
- 2.Rf2#
- 1...Sc1
- 2.Scd4#
- 2.Sfd4#
- 2.Bxg4#
- 1...Sg1
- 2.Scd4#
- 2.Sfd4#
- 2.Bxg4#
- 1...Seg3
- 2.Scd4#
- 2.Sfd4#
- 1...Sd4
- 2.Scxd4#
- 2.Sfxd4#
- 2.Bxg4#
- 1...d4
- 2.Qb7#
- 1...cxd2!
- 1...Rxg2
- 1.Rxe2?
- threat
- 2.Scd4#
- 2.Sfd4#
- 1...Bxh2
- 2.Bxg4#
- 2.Re3#
- 2.Qxg4#
- 1...Be3
- 2.Bxg4#
- 2.Rxe3#
- 2.Qxg4#
- 1...Bg3
- 2.Bxg4#
- 2.Re3#
- 2.Qxg4#
- 1...Be5
- 2.Bxg4#
- 2.Re3#
- 2.Qxg4#
- 1...Bg5
- 2.Bxg4#
- 2.Qxg4#
- 1...Bd6
- 2.Bxg4#
- 2.Re3#
- 2.Qxg4#
- 1...Bh6
- 2.Bxg4#
- 2.Qxg4#
- 1...Bc7
- 2.Bxg4#
- 2.Re3#
- 2.Qxg4#
- 1...Bb8
- 2.Bxg4#
- 2.Re3#
- 2.Qxg4#
- 1...d4
- 2.Scxd4#
- 2.Sfxd4#
- 1...Kxe2!
- threat
- 1.Rg3+?
- 1...Rxg3
- 2.Sh4#
- 1...Bxg3
- 2.Qxg4#
- 1...Sexg3
- 2.Scd4#
- 2.Sfd4#
- 1...Shxg3!
- 1...Rxg3
- 1.Qc4?
- threat
- 2.Qxd5#
- 1...Bxh2
- 2.Qxg4#
- 1...Be3
- 2.Qxg4#
- 1...Bg3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bd6
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bc7
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 1...Shg3
- 2.Rf2#
- 1...Seg3
- 2.Scd4#
- 2.Sfd4#
- 1...d4
- 2.Qd5#
- 2.Qc6#
- 1...dxc4!
- threat
- 1.Qd4?
- threat
- 2.Qxd5#
- 1...Bxh2
- 2.Qxg4#
- 1...Sxd4
- 2.Scxd4#
- 2.Sfxd4#
- 1...Be3
- 2.Qxg4#
- 1...Bg3
- 2.Qxg4#
- 1...Be5
- 2.Qxg4#
- 1...Bg5
- 2.Qxg4#
- 1...Bd6
- 2.Qxg4#
- 1...Bh6
- 2.Qxg4#
- 1...Bc7
- 2.Qxg4#
- 1...Bb8
- 2.Qxg4#
- 1...Sf2
- 2.Rxf2#
- 2.Qxf2#
- 1...Shg3
- 2.Rf2#
- 2.Qf2#
- 1...Seg3!
- threat
- 1.Ka3?
- Keys
- 1.Qf8!
- 1...Bxh2+
- 2.Sfd4#
- 1...Be3+
- 2.Sfd4#
- 1...Bg3+
- 2.Sfd4#
- 1...Be5+
- 2.Sfd4#
- 1...Bg5+
- 2.Sfd4#
- 1...Bd6+
- 2.Sfd4#
- 1...Bh6+
- 2.Sfd4#
- 1...Bc7+
- 2.Sfd4#
- 1...Bb8+
- 2.Sfd4#
- 1...Rxg2
- 2.Sh4#
- 1...dxe1Q
- 2.Sxe1#
- 1...dxe1S
- 2.Sxe1#
- 1...dxe1B
- 2.Sxe1#
- 1...dxe1R
- 2.Sxe1#
- 1...Rg3
- 2.Sh4#
- 1...Rh4
- 2.Sxh4#
- 1...Rg5
- 2.Sh4#
- 1...Rg6
- 2.Sh4#
- 1...Rg7
- 2.Sh4#
- 1...Rg8
- 2.Sh4#
- 1...Sf2
- 2.Rxf2#
- 1...Shg3
- 2.Rf2#
- 1...Sc1
- 2.Scd4#
- 2.Sfd4#
- 1...Sg1
- 2.Scd4#
- 2.Sfd4#
- 1...Seg3
- 2.Scd4#
- 2.Sfd4#
- 1...Sd4
- 2.Scxd4#
- 2.Sfxd4#
- 1...d4
- 2.Qa8#
- 1...Bxh2+
- 1.Qf8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 10
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(g);N_GUARD,XR(D)::S(J)
- R(g);N_GUARD::S(J)
- R(g);N_GUARD::S(J),XR(g)
- B(f);OGATE,P_PINQ(I),XP(E)::QAB1(I),XR(g)
- B(f);OGATE,P_PINQ(I)::QAB1(I),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- P(b);XB(B)::S(C),XQ(b)
- P(b);XB(B)::S(C),XS(b)
- P(b);XB(B)::S(C),XB(b)
- P(b);XB(B)::S(C),XR(b)
- P(h);OGATEB::QAB(I)
- Tries
- Try
- K(H);P-FLIGHT
- Vars
- R(g);N_GUARD,XR(D)::S(J)
- B(f);OGATE,XP(E)::QAB1(I),XR(g)
- P(b);XB(B)::S(C),XQ(b)
- P(b);XB(B)::S(C),XS(b)
- P(b);XB(B)::S(C),XB(b)
- P(b);XB(B)::S(C),XR(b)
- R(g);N_GUARD::S(J)
- R(g);N_GUARD::S(J),XR(g)
- B(f);OGATE::QAB1(I),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- P(h);OGATEB::QAB(I)
- Refutation
- B(f);P_PINQ(I)
- Try
- K(H);S_FLIGHT
- Vars
- R(g);N_GUARD,XR(D)::S(J)
- B(f);OGATE,XP(E)::QAB1(I),XR(g)
- P(b);XB(B)::S(C),XQ(b)
- P(b);XB(B)::S(C),XS(b)
- P(b);XB(B)::S(C),XB(b)
- P(b);XB(B)::S(C),XR(b)
- R(g);N_GUARD::S(J)
- R(g);N_GUARD::S(J),XR(g)
- B(f);OGATE::QAB1(I),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- P(h);OGATEB::QAB(I)
- Refutation
- S(c);CHECK
- Try
- K(H);P-FLIGHT
- Vars
- R(g);N_GUARD,XR(D)::S(J)
- B(f);OGATE,XP(E)::QAB1(I),XR(g)
- P(b);XB(B)::S(C),XQ(b)
- P(b);XB(B)::S(C),XS(b)
- P(b);XB(B)::S(C),XB(b)
- P(b);XB(B)::S(C),XR(b)
- R(g);N_GUARD::S(J)
- R(g);N_GUARD::S(J),XR(g)
- B(f);OGATE::QAB1(I),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- P(h);OGATEB::QAB(I)
- Refutation
- B(f);CHECK
- Try
- K(H);S_FLIGHT
- Vars
- R(g);N_GUARD,XR(D)::S(J)
- B(f);OGATE,XP(E)::QAB1(I),XR(g)
- P(b);XB(B)::S(C),XQ(b)
- P(b);XB(B)::S(C),XS(b)
- P(b);XB(B)::S(C),XB(b)
- P(b);XB(B)::S(C),XR(b)
- R(g);N_GUARD::S(J)
- R(g);N_GUARD::S(J),XR(g)
- B(f);OGATE::QAB1(I),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- Refutation
- P(h);
- Try
- B(B);
- Vars
- R(g);N_GUARD,XB(B)::S(J)
- B(f);OGATE,P_PINQ(I),XB(B)::QAB1(I),XR(g)
- R(g);N_GUARD::S(J),XR(g)
- R(g);N_GUARD::S(J)
- B(f);OGATE,P_PINQ(I)::QAB1(I),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- P(h);OGATEB::QAB(I)
- Refutation
- S(a);XB(B)
- Try
- R(A);XP(b)
- Vars
- R(g);N_GUARD,XR(D)::S(J)
- B(f);OGATE,P_PINQ(I),XR(A)::QAB1(I),XR(g)
- B(f);OGATE,P_PINQ(I),XP(E)::QAB1(I),XR(g)
- R(g);N_GUARD::S(J)
- R(g);N_GUARD::S(J),XR(g)
- B(f);OGATE,P_PINQ(I)::QAB1(I),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- P(h);OGATEB::QAB(I)
- Refutation
- P(d);XR(A)
- Try
- R(D);XS(c)
- Threat
- DUALS(2)
- Refutation
- K(e);S_FLIGHT,XR(D)
- Try
- R(D);CHECK
- Vars
- R(g);XR(D)::S(J)
- B(f);OGATE,P_PINQ(I),XR(D)::QAB1(I),XR(g)
- Refutation
- S(a);XR(D)
- Try
- Q(I);
- Threat
- QAB(I),XP(h)
- Vars
- B(f);OGATE,P_PINQ(I),XP(E)::QAB1(I),XR(g)
- B(f);OGATE,P_PINQ(I)::QAB1(I),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- Refutation
- P(h);XQ(I)
- Try
- Q(I);
- Threat
- QAB(I),XP(h)
- Vars
- B(f);OGATE,P_PINQ(I),XP(E)::QAB1(I),XR(g)
- B(f);OGATE,P_PINQ(I)::QAB1(I),XR(g)
- Refutation
- S(c);
- Try
- Actual
- Q(I);
- Vars
- B(f);CHECK,XP(E)::QAR(I)+S(J),DCHECK
- B(f);CHECK::QAR(I)+S(J),DCHECK
- R(g);N_GUARD,XR(D)::S(J)
- P(b);XB(B)::S(C),XQ(b)
- P(b);XB(B)::S(C),XS(b)
- P(b);XB(B)::S(C),XB(b)
- P(b);XB(B)::S(C),XR(b)
- R(g);N_GUARD::S(J)
- R(g);N_GUARD::S(J),XR(g)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- P(h);OGATEB::QAB(I)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).