MESON Chess Problem Database
Problem Display
PID: 101235 (8/6n1/3p1R2/3B4/2PR1P2/2p1kNNp/1nP2p1Q/7K w - - 0 1)
Sim, Malcolm
Good Companions, 1924
#2
10 + 7
| 3713 | Snap | 2009 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sa4
- 2.Rd3#
- 1...Sxc4
- 2.Rd3#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Se8
- 2.Re6#
- 1...f1Q+
- 2.Sxf1#
- 1...f1S
- 2.Sxf1#
- 2.Qg1#
- 2.Qe2#
- 1...f1B
- 2.Sxf1#
- 2.Qg1#
- 1...f1R+
- 2.Sxf1#
- 1...Sd1
- Tries
- 1.Sf5+?
- 1...Sxf5
- 2.Re6#
- 1...Ke2!
- 1...Sxf5
- 1.Bc6?
- 1...f1Q+
- 2.Sxf1#
- 1...f1R+
- 2.Sxf1#
- 1...Sxc4
- 2.Rd3#
- 1...f1S
- 2.Sxf1#
- 2.Qg1#
- 2.Qe2#
- 1...f1B
- 2.Sxf1#
- 2.Qg1#
- 1...Sd1
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sa4
- 2.Rd3#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Se8
- 2.Re6#
- 1...d5!
- 1...f1Q+
- 1.Bb7?
- 1...f1Q+
- 2.Sxf1#
- 1...f1R+
- 2.Sxf1#
- 1...Sxc4
- 2.Rd3#
- 1...f1S
- 2.Sxf1#
- 2.Qg1#
- 2.Qe2#
- 1...f1B
- 2.Sxf1#
- 2.Qg1#
- 1...Sd1
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sa4
- 2.Rd3#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Se8
- 2.Re6#
- 1...d5!
- 1...f1Q+
- 1.Ba8?
- 1...f1Q+
- 2.Sxf1#
- 1...f1R+
- 2.Sxf1#
- 1...Sxc4
- 2.Rd3#
- 1...f1S
- 2.Sxf1#
- 2.Qg1#
- 2.Qe2#
- 1...f1B
- 2.Sxf1#
- 2.Qg1#
- 1...Sd1
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sa4
- 2.Rd3#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Se8
- 2.Re6#
- 1...d5!
- 1...f1Q+
- 1.Rd2?
- threat
- 2.Sf1#
- 2.Re2#
- 2.Qxf2#
- 1...f1Q+
- 2.Sxf1#
- 1...f1R+
- 2.Sxf1#
- 1...Sf5
- 2.Sf1#
- 2.Sxf5#
- 1...f1S
- 2.Sxf1#
- 2.Re2#
- 2.Qg1#
- 2.Qe2#
- 2.Qf2#
- 1...f1B
- 2.Sxf1#
- 2.Qg1#
- 2.Qf2#
- 1...Sd1
- 2.Sf1#
- 2.Re2#
- 2.Rd3#
- 1...Sd3
- 2.Sf1#
- 2.Re2#
- 2.Rxd3#
- 1...cxd2!
- threat
- 1.Qg2?
- threat
- 2.Re4#
- 1...f1Q+
- 2.Sxf1#
- 1...f1R+
- 2.Sxf1#
- 1...hxg2+!
- threat
- 1.c5?
- 1...f1Q+
- 2.Sxf1#
- 1...f1R+
- 2.Sxf1#
- 1...f1S
- 2.Sxf1#
- 2.Qg1#
- 2.Qe2#
- 1...f1B
- 2.Sxf1#
- 2.Qg1#
- 1...Sd1
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sa4
- 2.Rd3#
- 1...Sc4
- 2.Rd3#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Se8
- 2.Re6#
- 1...dxc5!
- 1...f1Q+
- 1.Sf5+?
- Keys
- 1.Sg1!
- 1...fxg1Q+
- 2.Qxg1#
- 1...fxg1R+
- 2.Qxg1#
- 1...Kxd4
- 2.Qxf2#
- 1...Sxc4
- 2.Rd3#
- 1...fxg1S
- 2.Qxg1#
- 1...fxg1B
- 2.Qxg1#
- 1...Sd3
- 2.Rxd3#
- 1...f1Q
- 2.Re4#
- 1...f1S
- 2.Re4#
- 1...f1B
- 2.Re4#
- 1...f1R
- 2.Re4#
- 1...Sd1
- 2.Rd3#
- 1...Sa4
- 2.Rd3#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...fxg1Q+
- 1.Sg1!
This anticipates 91453(1993)
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- S(a);N_GUARD,XP(F)::R1(G)
- S(g);N_GUARD::R(J)
- S(g);N_GUARD::R(J),XS(g)
- P(b);CHECK::S(E),XQ(b)
- P(b);CHECK::S(E),XR(b)
- Tries
- Try
- S(E);CHECK
- Vars
- S(g);XS(E)::R(J)
- Refutation
- K(d);P-FLIGHT,P_SPINP(b)
- Try
- B(I);
- Vars
- P(b);CHECK::S(E),XQ(b)
- P(b);CHECK::S(E),XR(b)
- S(a);N_GUARD,XP(F)::R1(G)
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- S(g);N_GUARD::R(J)
- S(g);N_GUARD::R(J),XS(g)
- Refutation
- P(f);
- Try
- B(I);
- Vars
- P(b);CHECK::S(E),XQ(b)
- P(b);CHECK::S(E),XR(b)
- S(a);N_GUARD,XP(F)::R1(G)
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- S(g);N_GUARD::R(J)
- S(g);N_GUARD::R(J),XS(g)
- Refutation
- P(f);
- Try
- B(I);
- Vars
- P(b);CHECK::S(E),XQ(b)
- P(b);CHECK::S(E),XR(b)
- S(a);N_GUARD,XP(F)::R1(G)
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- S(g);N_GUARD::R(J)
- S(g);N_GUARD::R(J),XS(g)
- Refutation
- P(f);
- Try
- R(G);
- Threat
- DUALS(3)
- Vars
- P(b);CHECK::S(E),XQ(b)
- P(b);CHECK::S(E),XR(b)
- Refutation
- P(c);XR(G)
- Try
- Q(C);
- Threat
- R1(G)
- Vars
- P(b);CHECK::S(E),XQ(b)
- P(b);CHECK::S(E),XR(b)
- Refutation
- P(e);CHECK,XQ(C)
- Try
- P(F);
- Vars
- P(b);CHECK::S(E),XQ(b)
- P(b);CHECK::S(E),XR(b)
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- S(g);N_GUARD::R(J)
- S(g);N_GUARD::R(J),XS(g)
- Refutation
- P(f);XP(F)
- Try
- Actual
- S(D);
- Vars
- P(b);CHECK,OGATE,XS(D)::QAB(C),XQ(b)
- P(b);CHECK,OGATE,XS(D)::QAB(C),XR(b)
- K(d);S_FLIGHT,XR(G)::QAB(C),XP(b)
- S(a);N_GUARD,XP(F)::R1(G)
- P(b);OGATE,XS(D)::QAB(C),XS(b)
- P(b);OGATE,XS(D)::QAB(C),XB(b)
- S(a);N_GUARD::R1(G),XS(a)
- P(b);P_PINS(D)::R1(G)
- P(b);::R1(G)
- S(a);N_GUARD::R1(G)
- S(g);N_GUARD::S(E),XS(g)
- S(g);N_GUARD::S(E)
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).