MESON Chess Problem Database
Problem Display
PID: 139203 (4rnBQ/p3R3/2Np2p1/K4kr1/3Rp1p1/p1B4P/qp2N3/8 w - - 0 1)
Evans, TC
The Problemist, 1937
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Rd5#
- 1...Qd5+
- 2.Rxd5#
- 1...Qa1
- 2.Rd5#
- 1...Rxe7
- 2.Sxe7#
- 1...Se6
- 2.Rf7#
- 1...e3
- 2.Sg3#
- 2.Rf4#
- 1...d5
- 2.Qe5#
- 1...Qb1
- Tries
- 1.Bxa2?
- threat
- 2.Rd5#
- 2.Rf7#
- 1...Rxe7
- 2.Sxe7#
- 1...Rh5
- 2.Rd5#
- 1...Sd7
- 2.Be6#
- 1...Sh7
- 2.Be6#
- 2.Rd5#
- 1...d5
- 2.Rxd5#
- 2.Qe5#
- 1...gxh3!
- threat
- 1.Be6+?
- 1...Sxe6
- 2.Rf7#
- 1...Qxe6!
- 1...Sxe6
- 1.Rd1?
- threat
- 2.Scd4#
- 2.Rf1#
- 2.Qf6#
- 1...Qd5+
- 2.Rxd5#
- 1...Rh5
- 2.Qf6#
- 1...b1Q
- 2.Scd4#
- 2.Qf6#
- 1...b1R
- 2.Scd4#
- 2.Qf6#
- 1...Qb1
- 2.Scd4#
- 2.Rd5#
- 2.Qf6#
- 1...Qc4
- 2.Rf1#
- 2.Qf6#
- 1...Qe6
- 2.Scd4#
- 2.Rf1#
- 1...Qf7
- 2.Scd4#
- 2.Rf1#
- 1...Qa1
- 2.Scd4#
- 2.Rd5#
- 2.Qf6#
- 1...Se6
- 2.Rf7#
- 2.Qf6#
- 1...Sd7
- 2.Scd4#
- 2.Rf1#
- 1...Sh7
- 2.Scd4#
- 2.Rf1#
- 1...gxh3!
- threat
- 1.Rd2?
- threat
- 2.Scd4#
- 2.Qf6#
- 1...Qd5+
- 2.Rxd5#
- 1...Rh5
- 2.Qf6#
- 1...Qc4
- 2.Qf6#
- 1...Qe6
- 2.Scd4#
- 1...Qf7
- 2.Scd4#
- 1...Se6
- 2.Rf7#
- 2.Qf6#
- 1...Sd7
- 2.Scd4#
- 1...Sh7
- 2.Scd4#
- 1...gxh3!
- threat
- 1.Rd3?
- threat
- 2.Scd4#
- 2.Qf6#
- 1...Qd5+
- 2.Rxd5#
- 1...Rh5
- 2.Qf6#
- 1...Qc4
- 2.Qf6#
- 1...Qe6
- 2.Scd4#
- 1...Qf7
- 2.Scd4#
- 1...Se6
- 2.Rf7#
- 2.Qf6#
- 1...Sd7
- 2.Scd4#
- 1...Sh7
- 2.Scd4#
- 1...gxh3!
- threat
- 1.Rc4?
- threat
- 2.Scd4#
- 2.Qf6#
- 1...Qxc4
- 2.Qf6#
- 1...Rh5
- 2.Qf6#
- 1...Se6
- 2.Bxe6#
- 2.Rf7#
- 2.Qf6#
- 1...Sd7
- 2.Scd4#
- 2.Be6#
- 1...Sh7
- 2.Scd4#
- 2.Be6#
- 1...gxh3!
- threat
- 1.Rdxe4?
- threat
- 2.Sg3#
- 2.Sed4#
- 2.Scd4#
- 2.Rf4#
- 2.Qf6#
- 1...Rxe7
- 2.Sg3#
- 2.Rf4#
- 1...gxh3
- 2.Sed4#
- 2.Scd4#
- 2.Rf4#
- 2.Qf6#
- 1...Qe6
- 2.Sg3#
- 2.Rf4#
- 1...Rh5
- 2.Qf6#
- 1...Se6
- 2.Sg3#
- 1...Qc4
- 2.Sg3#
- 2.Qf6#
- 1...Qf7
- 2.Sg3#
- 2.Sed4#
- 2.Scd4#
- 2.Rf4#
- 1...Sd7
- 2.Sg3#
- 2.Sed4#
- 2.Scd4#
- 2.Rf4#
- 1...Sh7
- 2.Sg3#
- 2.Sed4#
- 2.Scd4#
- 2.Rf4#
- 1...g3
- 2.Sed4#
- 2.Scd4#
- 2.Rf4#
- 2.Qf6#
- 1...Qd5+!
- threat
- 1.Rxd6?
- threat
- 2.Scd4#
- 2.Rf6#
- 2.Qe5#
- 2.Qf6#
- 1...Qd5+
- 2.Rxd5#
- 1...Rxe7
- 2.Scd4#
- 2.Sxe7#
- 2.Rf6#
- 2.Qf6#
- 1...Rh5
- 2.Qe5#
- 2.Qf6#
- 1...Qc4
- 2.Rf6#
- 2.Qe5#
- 2.Qf6#
- 1...Qe6
- 2.Scd4#
- 1...Qf7
- 2.Scd4#
- 2.Rxf7#
- 2.Qe5#
- 1...Se6
- 2.Rf7#
- 2.Qe5#
- 2.Qf6#
- 1...Sd7
- 2.Scd4#
- 1...Sh7
- 2.Scd4#
- 2.Qe5#
- 1...gxh3!
- threat
- 1.Bxa2?
- Keys
- 1.Qh4!
- threat
- 2.Qf2#
- 1...Kf6+
- 2.Rd5#
- 1...Qd5+
- 2.Rxd5#
- 1...gxh3
- 2.Qf4#
- 1...Rh5
- 2.hxg4#
- 1...Se6
- 2.Rf7#
- 1...e3
- 2.Rf4#
- 1...g3
- 2.Qf4#
- threat
- 1.Qh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 4
- Sets
- Q(a);N_GUARD::R(D)
- Q(a);CHECK,N_GUARD::R(D),XQ(a)
- R(k);XR(G)::S(F),XR(k)
- S(l);SBLOCK,S_CUTQ(a)::R(G)
- P(h);N_GUARD::QAR1(I)
- Tries
- Try
- B(H);XQ(a)
- Threat
- DUALS(2)
- Vars
- R(k);XR(G)::S(F),XR(k)
- R(g);::R(D)
- S(l);N_GUARD::B(H)
- Refutation
- P(e);XP(C)
- Try
- B(H);CHECK
- Vars
- S(l);SBLOCK,XB(H)::R(G)
- Refutation
- Q(a);XB(H)
- Try
- R(D);
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,N_GUARD::R(D),XQ(a)
- R(g);::QAR1(I)
- Refutation
- P(e);XP(C)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,N_GUARD::R(D),XQ(a)
- R(g);::QAR1(I)
- Q(a);::QAR1(I)
- Q(a);::S(F)
- S(l);::S(F)
- Refutation
- P(e);XP(C)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,N_GUARD::R(D),XQ(a)
- R(g);::QAR1(I)
- Q(a);::QAR1(I)
- Q(a);::S(F)
- S(l);::S(F)
- Refutation
- P(e);XP(C)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- Q(a);XR(D)::QAR1(I)
- R(g);::QAR1(I)
- Refutation
- P(e);XP(C)
- Try
- R(D);XP(d)
- Threat
- DUALS(5)
- Vars
- R(g);::QAR1(I)
- S(l);::S(A)
- Refutation
- Q(a);CHECK
- Try
- R(D);XP(h)
- Threat
- DUALS(4)
- Vars
- Q(a);CHECK,N_GUARD::R(D),XQ(a)
- Q(a);::S(F)
- S(l);::S(F)
- Refutation
- P(e);XP(C)
- Try
- Actual
- Q(I);
- Threat
- QAR(I)
- Vars
- K(f);CHECK,P-FLIGHT,P_SPINR(g)::B(B)+R(D)
- Q(a);CHECK,N_GUARD::R(D),XQ(a)
- P(e);OGATE,XP(C)::QAR1(I)
- R(g);N_GUARD::P(C),XP(e)
- S(l);SBLOCK,S_CUTQ(a)::R(G)
- P(d);OGATE::R1(D)
- P(e);OGATE::QAR1(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).