MESON Chess Problem Database
Problem Display
PID: 222768 (Q5b1/1r5p/1R1bP2n/2p1k1N1/1nPq1R2/1P3pP1/3P1N2/B4K2 w - - 0 1)
Dobbs, Gilbert S
Tidskrift for Schack, 1910
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxa1+
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- 1...Qc3
- 2.Bxc3#
- 1...Rxb6
- 2.Qe4#
- 1...Ra7
- 2.Qe4#
- 1...Rc7
- 2.Qe4#
- 1...Rd7
- 2.Qe4#
- 1...Re7
- 2.Qe4#
- 1...Rf7
- 2.Qe4#
- 1...Rg7
- 2.Qe4#
- 1...Rb8
- 2.Qe4#
- 1...Bc7
- 2.Sxf3#
- 1...Be7
- 2.Sxf3#
- 1...Bb8
- 2.Sxf3#
- 1...Bf8
- 2.Sxf3#
- 1...Bxe6
- 2.Sxf3#
- 1...Bf7
- 2.Qh8#
- 1...Sa2
- 2.Sd3#
- 1...Sc2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sd5
- 2.Sd3#
- 1...Sa6
- 2.Sd3#
- 1...Sc6
- 2.Sd3#
- 1...Sg4
- 2.Sxg4#
- 1...Sf5
- 2.Sg4#
- 1...Sf7
- 2.Sg4#
- 1...Qxa1+
- Tries
- 1.Ke1?
- 1...Qxa1+
- 2.Qxa1#
- 1...Sd3+
- 2.Sxd3#
- 1...Rxb6
- 2.Qe4#
- 1...Bxe6
- 2.Sxf3#
- 1...Sf5
- 2.Sg4#
- 1...Qb2
- 2.Bxb2#
- 1...Qc3
- 2.Bxc3#
- 1...Ra7
- 2.Qe4#
- 1...Rc7
- 2.Qe4#
- 1...Rd7
- 2.Qe4#
- 1...Re7
- 2.Qe4#
- 1...Rf7
- 2.Qe4#
- 1...Rg7
- 2.Qe4#
- 1...Rb8
- 2.Qe4#
- 1...Bc7
- 2.Sxf3#
- 1...Be7
- 2.Sxf3#
- 1...Bb8
- 2.Sxf3#
- 1...Bf8
- 2.Sxf3#
- 1...Bf7
- 2.Qh8#
- 1...Sa2
- 2.Sd3#
- 1...Sd5
- 2.Sd3#
- 1...Sa6
- 2.Sd3#
- 1...Sc6
- 2.Sd3#
- 1...Sg4
- 2.Sxg4#
- 1...Sf7
- 2.Sg4#
- 1...Sc2+!
- 1...Qxa1+
- 1.Bb2?
- 1...Rxb6
- 2.Qe4#
- 1...Bxe6
- 2.Sxf3#
- 1...Sf5
- 2.Sg4#
- 1...Sa2
- 2.Sd3#
- 1...Qc3
- 2.Bxc3#
- 1...Ra7
- 2.Qe4#
- 1...Rc7
- 2.Qe4#
- 1...Rd7
- 2.Qe4#
- 1...Re7
- 2.Qe4#
- 1...Rf7
- 2.Qe4#
- 1...Rg7
- 2.Qe4#
- 1...Rb8
- 2.Qe4#
- 1...Bc7
- 2.Sxf3#
- 1...Be7
- 2.Sxf3#
- 1...Bb8
- 2.Sxf3#
- 1...Bf8
- 2.Sxf3#
- 1...Bf7
- 2.Qh8#
- 1...Sc2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sd5
- 2.Sd3#
- 1...Sa6
- 2.Sd3#
- 1...Sc6
- 2.Sd3#
- 1...Sg4
- 2.Sxg4#
- 1...Sf7
- 2.Sg4#
- 1...Qxb2!
- 1...Rxb6
- 1.Bc3?
- 1...Rxb6
- 2.Qe4#
- 1...Bxe6
- 2.Sxf3#
- 1...Sf5
- 2.Sg4#
- 1...Sa2
- 2.Sd3#
- 1...Ra7
- 2.Qe4#
- 1...Rc7
- 2.Qe4#
- 1...Rd7
- 2.Qe4#
- 1...Re7
- 2.Qe4#
- 1...Rf7
- 2.Qe4#
- 1...Rg7
- 2.Qe4#
- 1...Rb8
- 2.Qe4#
- 1...Bc7
- 2.Sxf3#
- 1...Be7
- 2.Sxf3#
- 1...Bb8
- 2.Sxf3#
- 1...Bf8
- 2.Sxf3#
- 1...Bf7
- 2.Qh8#
- 1...Sc2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sd5
- 2.Sd3#
- 1...Sa6
- 2.Sd3#
- 1...Sc6
- 2.Sd3#
- 1...Sg4
- 2.Sxg4#
- 1...Sf7
- 2.Sg4#
- 1...Qxc3!
- 1...Rxb6
- 1.Rf5+?
- 1...Sxf5
- 2.Sg4#
- 1...Kxf5!
- 1...Sxf5
- 1.Ra6?
- 1...Bxe6
- 2.Sxf3#
- 1...Sxa6
- 2.Sd3#
- 1...Sf5
- 2.Sg4#
- 1...Sa2
- 2.Sd3#
- 1...Qb2
- 2.Bxb2#
- 1...Qc3
- 2.Bxc3#
- 1...Rb5
- 2.Qe4#
- 1...Rb6
- 2.Qe4#
- 1...Ra7
- 2.Qe4#
- 1...Rc7
- 2.Qe4#
- 1...Rd7
- 2.Qe4#
- 1...Re7
- 2.Qe4#
- 1...Rf7
- 2.Qe4#
- 1...Rg7
- 2.Qe4#
- 1...Rb8
- 2.Qe4#
- 1...Bc7
- 2.Sxf3#
- 1...Be7
- 2.Sxf3#
- 1...Bb8
- 2.Sxf3#
- 1...Bf8
- 2.Sxf3#
- 1...Bf7
- 2.Qh8#
- 1...Sc2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sd5
- 2.Sd3#
- 1...Sc6
- 2.Sd3#
- 1...Sg4
- 2.Sxg4#
- 1...Sf7
- 2.Sg4#
- 1...Qxa1+!
- 1...Bxe6
- 1.Qxb7?
- threat
- 2.Qe4#
- 2.Qg7#
- 1...Sf5
- 2.Sg4#
- 1...Bc7
- 2.Sxf3#
- 2.Qe4#
- 2.Qxc7#
- 1...Be7
- 2.Sxf3#
- 2.Qe4#
- 1...Bf8
- 2.Sxf3#
- 2.Qe4#
- 1...Bf7
- 2.Qe4#
- 1...Sd5
- 2.Sd3#
- 2.Qxd5#
- 1...Sc6
- 2.Sd3#
- 2.Qg7#
- 1...Sg4
- 2.Sxg4#
- 2.Qe4#
- 1...Sf7
- 2.Sg4#
- 2.Qe4#
- 1...Qxa1+!
- threat
- 1.Qd8?
- threat
- 2.Qf6#
- 2.Qxd6#
- 1...Rxb6
- 2.Qf6#
- 1...Rd7
- 2.Qf6#
- 1...Re7
- 2.Qxd6#
- 1...Rf7
- 2.Qxd6#
- 1...Bc7
- 2.Sxf3#
- 2.Qf6#
- 1...Be7
- 2.Sxf3#
- 1...Bb8
- 2.Sxf3#
- 2.Qf6#
- 1...Bf8
- 2.Sxf3#
- 2.Qf6#
- 1...Sd5
- 2.Sd3#
- 2.Qxd6#
- 1...Sc6
- 2.Sd3#
- 2.Qf6#
- 1...Sg4
- 2.Sxg4#
- 2.Qxd6#
- 1...Sf5
- 2.Sg4#
- 2.Re4#
- 1...Sf7
- 2.Sg4#
- 2.Qf6#
- 1...Qxa1+!
- threat
- 1.Qf8?
- threat
- 2.Re4#
- 2.Qxd6#
- 2.Qf6#
- 1...Rxb6
- 2.Re4#
- 2.Qg7#
- 2.Qf6#
- 1...Bxf8
- 2.Sxf3#
- 1...Rd7
- 2.Re4#
- 2.Qf6#
- 1...Re7
- 2.Re4#
- 2.Qf6#
- 1...Rf7
- 2.Qxd6#
- 1...Bc7
- 2.Sxf3#
- 2.Re4#
- 2.Qg7#
- 2.Qf6#
- 1...Be7
- 2.Sxf3#
- 2.Re4#
- 1...Bb8
- 2.Sxf3#
- 2.Re4#
- 2.Qf6#
- 1...Bf7
- 2.Qxd6#
- 2.Qg7#
- 2.Qh8#
- 1...Sd5
- 2.Sd3#
- 2.Re4#
- 2.Qxd6#
- 1...Sc6
- 2.Sd3#
- 2.Re4#
- 2.Qf6#
- 1...Sg4
- 2.Sxg4#
- 2.Re4#
- 2.Rf5#
- 2.Qxd6#
- 2.Qf5#
- 1...Sf5
- 2.Sg4#
- 2.Re4#
- 2.Rxf5#
- 2.Qxf5#
- 1...Sf7
- 2.Sg4#
- 2.Qg7#
- 1...Qxa1+!
- threat
- 1.e7?
- 1...Qxa1+
- 2.Qxa1#
- 1...Rxb6
- 2.Qe4#
- 1...Rxe7
- 2.Qe4#
- 1...Bxe7
- 2.Sxf3#
- 1...Sf5
- 2.Sg4#
- 1...Sa2
- 2.Sd3#
- 1...Qb2
- 2.Bxb2#
- 1...Qc3
- 2.Bxc3#
- 1...Ra7
- 2.Qe4#
- 1...Rc7
- 2.Qe4#
- 1...Rd7
- 2.Qe4#
- 1...Rb8
- 2.Qe4#
- 1...Bc7
- 2.Sxf3#
- 1...Bb8
- 2.Sxf3#
- 1...Bd5
- 2.Qh8#
- 1...Be6
- 2.Sxf3#
- 2.Qh8#
- 1...Bf7
- 2.Qh8#
- 1...Sc2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sd5
- 2.Sd3#
- 1...Sa6
- 2.Sd3#
- 1...Sc6
- 2.Sd3#
- 1...Sg4
- 2.Sxg4#
- 1...Sf7
- 2.Sg4#
- 1...Bxc4+!
- 1...Qxa1+
- 1.Ke1?
- Keys
- 1.Qa5!
- threat
- 2.Bxd4#
- 1...Qxa1+
- 2.Qxa1#
- 1...Sf5
- 2.Sg4#
- 1...Qb2
- 2.Bxb2#
- 1...Qc3
- 2.Bxc3#
- 1...Sc2
- 2.Sd3#
- 1...Sd5
- 2.Sd3#
- 1...Sc6
- 2.Sd3#
- threat
- 1.Qa5!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 19
- Sets
- Q(c);CHECK,N_SPINQ(c),OGATE,XB(A)::QAB(L),XQ(c)
- Q(c);OGATEB::B(A),XQ(c)
- R(h);OGATE,XR(J)::QAR1(L)
- R(h);OGATE::QAR1(L)
- B(f);::S(I),XP(a)
- B(j);SBLOCK,XP(K)::S(I),XP(a)
- B(j);OGATE::QAB(L)
- S(b);N_GUARD::S(D)
- S(b);N_GUARD::S(D),XS(b)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- Q(c);CHECK,N_SPINQ(c),OGATE,XB(A)::QAB(L),XQ(c)
- S(b);CHECK,N_GUARD::S(D),XS(b)
- R(h);OGATE,XR(J)::QAR1(L)
- B(j);SBLOCK,XP(K)::S(I),XP(a)
- S(g);N_GUARD::S(D)
- Q(c);OGATEB::B(A),XQ(c)
- Q(c);OGATEB,P_PINP(C)::B(A),XQ(c)
- R(h);OGATE::QAR1(L)
- B(f);::S(I),XP(a)
- B(j);OGATE::QAB(L)
- S(b);N_GUARD::S(D)
- S(g);N_GUARD::S(D),XS(g)
- Refutation
- S(b);CHECK
- Try
- B(A);
- Vars
- R(h);OGATE,XR(J)::QAR1(L)
- B(j);SBLOCK,XP(K)::S(I),XP(a)
- S(g);N_GUARD::S(D)
- S(b);N_GUARD::S(D)
- Q(c);OGATEB::B(A),XQ(c)
- R(h);OGATE::QAR1(L)
- B(f);::S(I),XP(a)
- B(j);OGATE::QAB(L)
- S(b);N_GUARD::S(D),XS(b)
- S(g);N_GUARD::S(D),XS(g)
- Refutation
- Q(c);N_SPINQ(c),XB(A)
- Try
- B(A);
- Vars
- R(h);OGATE,XR(J)::QAR1(L)
- B(j);SBLOCK,XP(K)::S(I),XP(a)
- S(g);N_GUARD::S(D)
- S(b);N_GUARD::S(D)
- R(h);OGATE::QAR1(L)
- B(f);::S(I),XP(a)
- B(j);OGATE::QAB(L)
- S(b);N_GUARD::S(D),XS(b)
- S(g);N_GUARD::S(D),XS(g)
- Refutation
- Q(c);N_SPINQ(c),XB(A)
- Try
- R(H);CHECK
- Vars
- S(g);SBLOCK,XR(H)::S(D)
- Refutation
- K(e);N_SPINQ(c),P-FLIGHT,XR(H)
- Try
- R(J);
- Vars
- B(j);SBLOCK,XP(K)::S(I),XP(a)
- S(b);N_GUARD,XR(J)::S(D)
- S(g);N_GUARD::S(D)
- S(b);N_GUARD::S(D)
- Q(c);OGATEB::B(A),XQ(c)
- R(h);OGATE::QAR1(L)
- B(f);::S(I),XP(a)
- B(j);OGATE::QAB(L)
- S(b);N_GUARD::S(D),XS(b)
- S(g);N_GUARD::S(D),XS(g)
- Refutation
- Q(c);CHECK,N_SPINQ(c),XB(A)
- Try
- Q(L);XR(h)
- Threat
- DUALS(2)
- Vars
- S(g);N_GUARD::S(D)
- B(j);::QAR1(L)
- Refutation
- Q(c);CHECK,N_SPINQ(c),XB(A)
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- R(h);XR(J)::QAB1(L)
- R(h);::QAB1(L)
- R(h);::QAB1(L),XB(f)
- B(f);::S(I),XP(a)
- Refutation
- Q(c);CHECK,N_SPINQ(c),XB(A)
- Try
- Q(L);
- Threat
- DUALS(3)
- Vars
- B(f);XQ(L)::S(I),XP(a)
- R(h);::QAB1(L),XB(f)
- Refutation
- Q(c);CHECK,N_SPINQ(c),XB(A)
- Try
- P(K);
- Vars
- Q(c);CHECK,N_SPINQ(c),OGATE,XB(A)::QAB(L),XQ(c)
- R(h);OGATE,XR(J)::QAR1(L)
- R(h);OGATE,XP(K)::QAR1(L)
- B(f);XP(K)::S(I),XP(a)
- S(g);N_GUARD::S(D)
- S(b);N_GUARD::S(D)
- Q(c);OGATEB::B(A),XQ(c)
- R(h);OGATE::QAR1(L)
- B(f);::S(I),XP(a)
- B(j);OGATE::QAB(L)
- S(b);N_GUARD::S(D),XS(b)
- S(g);N_GUARD::S(D),XS(g)
- Refutation
- B(j);CHECK,XP(G)
- Try
- Actual
- Q(L);P_PINP(d)
- Threat
- B(A),XQ(c)
- Vars
- Q(c);CHECK,N_SPINQ(c),OGATE,XB(A)::QAB(L),XQ(c)
- S(g);N_GUARD::S(D)
- Q(c);OGATEB::B(A),XQ(c)
- S(b);N_GUARD::S(D)
- S(b);N_GUARD,N_SPINP(d)::S(D)
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).