MESON Chess Problem Database
Problem Display
PID: 57595 (1n6/1K2P1RB/1pPNk3/2P1n1pq/8/7r/3Q1R1b/B4r2 w - - 0 1)
Costikyan, Simon
Chess Life, 1957
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.e8Q#
- 2.e8R#
- 1...Qe2
- 2.e8Q#
- 2.e8R#
- 1...Qg4
- 2.e8Q#
- 2.e8R#
- 1...Qh4
- 2.e8Q#
- 2.e8R#
- 1...Qh6
- 2.e8Q#
- 2.e8R#
- 1...Qxh7
- 2.e8Q#
- 2.e8R#
- 1...Sd3
- 2.Qa2#
- 1...Sf3
- 2.Bf5#
- 2.Qa2#
- 1...Sc4
- 2.Bf5#
- 1...Sg4
- 2.Bf5#
- 1...Sexc6
- 2.Bf5#
- 1...Sg6
- 2.Bg8#
- 1...Sed7
- 2.Bf5#
- 1...Sf7
- 2.e8Q#
- 2.e8R#
- 1...Qd1
- Tries
- 1.Se4?
- threat
- 2.Bf5#
- 2.Qd6#
- 1...Qxh7
- 2.Sxg5#
- 2.Qd6#
- 2.e8Q#
- 2.e8R#
- 1...Rxf2
- 2.Qd6#
- 1...Sexc6
- 2.Bf5#
- 1...Qf7
- 2.Qd6#
- 1...Sd3
- 2.Qa2#
- 1...Sf7
- 2.e8Q#
- 2.e8R#
- 1...Qd1
- 2.Sxg5#
- 2.Bf5#
- 2.e8Q#
- 2.e8R#
- 1...Qf3
- 2.Qd6#
- 2.e8Q#
- 2.e8R#
- 1...Qg4
- 2.Qd6#
- 2.e8Q#
- 2.e8R#
- 1...Qg6
- 2.Qd6#
- 1...Rd1
- 2.Bf5#
- 2.Rf6#
- 1...Rf3
- 2.Qd6#
- 1...Bf4
- 2.Qd6#
- 1...Sf3
- 2.Qa2#
- 1...Sc4
- 2.Bf5#
- 1...Sg4
- 2.Bf5#
- 1...Sg6
- 2.Bg8#
- 1...Sed7
- 2.Bf5#
- 1...g4
- 2.Qd6#
- 1...Rd3!
- threat
- 1.Se8?
- threat
- 2.Sc7#
- 2.Bf5#
- 2.Qd6#
- 1...Qxe8
- 2.Qd6#
- 1...Qxh7
- 2.Sc7#
- 2.Qd6#
- 1...Rxf2
- 2.Qd6#
- 1...Sexc6
- 2.Bf5#
- 1...Qf7
- 2.Qd6#
- 1...Rd3
- 2.Sc7#
- 1...Sd3
- 2.Qa2#
- 1...Qd1
- 2.Sc7#
- 2.Bf5#
- 1...Qf3
- 2.Qd6#
- 1...Qg4
- 2.Sc7#
- 2.Qd6#
- 1...Qg6
- 2.Sc7#
- 2.Qd6#
- 1...Rd1
- 2.Sc7#
- 2.Bf5#
- 2.Rf6#
- 1...Rf3
- 2.Qd6#
- 1...Bf4
- 2.Qd6#
- 1...Sf3
- 2.Qa2#
- 1...Sc4
- 2.Bf5#
- 1...Sg4
- 2.Bf5#
- 1...Sg6
- 2.Bg8#
- 1...Sed7
- 2.Bf5#
- 1...Sa6
- 2.Bf5#
- 2.Qd6#
- 1...g4
- 2.Sc7#
- 2.Qd6#
- 1...Sf7!
- threat
- 1.Bg8+?
- 1...Sf7
- 2.e8Q#
- 2.e8R#
- 1...Qf7!
- 1...Sf7
- 1.Qa2+?
- 1...Sc4
- 2.Qxc4#
- 1...Rb3!
- 1...Sc4
- 1.Se4?
- Keys
- 1.Sb5!
- threat
- 2.Sc7#
- 2.Qd6#
- 1...Rxf2
- 2.Qd6#
- 1...Sexc6
- 2.Bf5#
- 1...Qf3
- 2.Qd6#
- 1...Qf7
- 2.Qd6#
- 1...Rd3
- 2.Sc7#
- 1...Rf3
- 2.Qd6#
- 1...Bf4
- 2.Qd6#
- 1...Sd3
- 2.Qa2#
- 1...Sf7
- 2.e8Q#
- 2.e8R#
- 1...Qd1
- 2.Sc7#
- 2.e8Q#
- 2.e8R#
- 1...Rd1
- 2.Sc7#
- 1...Sf3
- 2.Qa2#
- 1...Sc4
- 2.Bf5#
- 1...Sg4
- 2.Bf5#
- 1...Sg6
- 2.Bg8#
- 1...Sed7
- 2.Bf5#
- 1...Sa6
- 2.Qd6#
- threat
- 1.Sb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 0
- Sets
- Q(f);N_GUARD::P=Q
- Q(f);N_GUARD,XB(J)::P=Q
- S(d);N_GUARD,S_CUTR(c)::QAB(B)
- S(d);::B(J)
- S(d);XP(E)::B(J)
- S(d);N_GUARD,S_CUTQ(f)::B(J)
- S(d);S_CUTQ(f)::P=Q
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(a);XR(C)::QAR1(B)
- S(d);XP(E)::B(J)
- Q(f);P_PINP(H)::QAR1(B)
- S(d);N_GUARD,S_CUTR(c)::QAB(B)
- S(d);S_CUTQ(f)::P=Q
- Q(f);::QAR1(B)
- R(c);::QAR1(B)
- B(b);::QAR1(B)
- S(d);::B(J)
- S(d);N_GUARD,S_CUTQ(f)::B(J)
- P(e);::QAR1(B)
- Refutation
- R(c);
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- Q(f);XS(F)::QAR1(B)
- R(a);XR(C)::QAR1(B)
- S(d);XP(E)::B(J)
- Q(f);P_PINP(H)::QAR1(B)
- R(c);::S(F)
- S(d);N_GUARD,S_CUTR(c)::QAB(B)
- Q(f);P_PINP(E)::QAR1(B)
- R(c);::QAR1(B)
- B(b);::QAR1(B)
- S(d);::B(J)
- S(d);N_GUARD,S_CUTQ(f)::B(J)
- Refutation
- S(d);
- Try
- B(J);CHECK
- Vars
- S(d);P_SPINS(d)::P=Q
- Refutation
- Q(f);P_PINP(H),P_SPINQ(f)
- Try
- Q(B);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAB(B),XS(d)
- Refutation
- R(c);P_SPINR(c)
- Try
- Actual
- S(F);
- Threat
- DUALS(2)
- Vars
- R(a);XR(C)::QAR1(B)
- S(d);XP(E)::B(J)
- Q(f);P_PINP(E)::QAR1(B)
- Q(f);P_PINP(H)::QAR1(B)
- R(c);::S(F)
- R(c);::QAR1(B)
- B(b);::QAR1(B)
- S(d);N_GUARD,S_CUTR(c)::QAB(B)
- S(d);S_CUTQ(f)::P=Q
- R(a);::S(F)
- S(d);::B(J)
- S(d);N_GUARD,S_CUTQ(f)::B(J)
- S(i);::QAR1(B)
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).