MESON Chess Problem Database
Problem Display
PID: 133900 (8/5p1b/pq4B1/2Q2p2/Nr2kp2/2BR4/r1nP1K2/2N4R w - - 0 1)
Subrahmanyam, Swaminatha
The Field, 1962
(First published on Thu Aug 2 1962)
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxc5+
- 2.Sxc5#
- 1...Qc7
- 2.Qd5#
- 2.Qxf5#
- 1...Qd8
- 2.Qe5#
- 2.Qxf5#
- 1...Qc6
- 2.Qe5#
- 2.Qxf5#
- 2.Qxc6#
- 1...Qd6
- 2.Qxf5#
- 1...Qf6
- 2.Qd5#
- 1...Qxg6
- 2.Qd5#
- 2.Qe5#
- 1...Qb7
- 2.Qe5#
- 2.Qxf5#
- 1...Qb8
- 2.Qd5#
- 2.Qxf5#
- 2.Qc6#
- 1...Rd4
- 2.Qxf5#
- 1...Bg8
- 2.Bxf5#
- 1...Sa1
- 2.Re1#
- 1...Se1
- 2.Rxe1#
- 1...Sa3
- 2.Re1#
- 1...Se3
- 2.Qe5#
- 1...f3
- 2.Rh4#
- 1...Qxc5+
- Tries
- 1.Bd4?
- threat
- 2.Sc3#
- 2.Qe5#
- 2.Qxf5#
- 1...Qxg6
- 2.Sc3#
- 2.Qe5#
- 1...Raxa4
- 2.Qe5#
- 2.Qxf5#
- 1...Rbxa4
- 2.Qe5#
- 2.Qxf5#
- 1...Rxd4
- 2.Sc3#
- 2.Qxf5#
- 1...Bxg6
- 2.Sc3#
- 2.Qe5#
- 1...Sxd4
- 2.Sc3#
- 1...fxg6
- 2.Sc3#
- 2.Qe5#
- 1...f3
- 2.Rh4#
- 2.Qe5#
- 2.Qxf5#
- 1...Qa5
- 2.Sc3#
- 1...Qc7
- 2.Sc3#
- 2.Qxf5#
- 1...Qb5
- 2.Sc3#
- 1...Qd6
- 2.Sc3#
- 2.Qxf5#
- 1...Qe6
- 2.Sc3#
- 1...Qf6
- 2.Sc3#
- 1...Qb8
- 2.Sc3#
- 2.Qxf5#
- 2.Qc6#
- 1...Ra3
- 2.Qe5#
- 2.Qxf5#
- 1...Rb3
- 2.Qe5#
- 2.Qxf5#
- 1...Rc4
- 2.Qe5#
- 2.Qxf5#
- 1...Rb5
- 2.Sc3#
- 1...Se3
- 2.Sc3#
- 2.Qe5#
- 1...f6
- 2.Sc3#
- 2.Qxf5#
- 1...Qxc5!
- threat
- 1.Re1+?
- 1...Se3
- 2.Qd5#
- 2.Qe5#
- 2.Qxf5#
- 1...Sxe1!
- 1...Se3
- 1.Re3+?
- 1...Sxe3
- 2.Qe5#
- 1...fxe3+!
- 1...Sxe3
- 1.Rd4+?
- 1...Rxd4
- 2.Qxf5#
- 1...Sxd4!
- 1...Rxd4
- 1.Rd5?
- threat
- 2.Re5#
- 2.d3#
- 1...f3
- 2.Rh4#
- 1...Sd4
- 2.Re5#
- 1...Qc7
- 2.d3#
- 1...Qb5
- 2.Re5#
- 1...Qd6
- 2.d3#
- 1...Qe6
- 2.d3#
- 1...Qf6
- 2.d3#
- 1...Qb8
- 2.d3#
- 1...Rd4
- 2.Re5#
- 1...Sa1
- 2.Re1#
- 2.Re5#
- 1...Se1
- 2.Rxe1#
- 2.Re5#
- 1...Sa3
- 2.Re1#
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...f6
- 2.d3#
- 1...Qxc5+!
- threat
- 1.Rd6?
- threat
- 2.d3#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qxd6
- 2.Qxf5#
- 1...f3
- 2.Rh4#
- 1...Sd4
- 2.Qd5#
- 1...Rd4
- 2.Qxf5#
- 1...Sa1
- 2.Re1#
- 1...Se1
- 2.Rxe1#
- 1...Sa3
- 2.Re1#
- 1...Se3
- 2.Qe5#
- 1...Qb5!
- threat
- 1.Rd8?
- threat
- 2.d3#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qxd8
- 2.Qe5#
- 2.Qxf5#
- 1...f3
- 2.Rh4#
- 1...Sd4
- 2.Qd5#
- 1...Qd6
- 2.Qxf5#
- 1...Rd4
- 2.Qxf5#
- 1...Sa1
- 2.Re1#
- 1...Se1
- 2.Rxe1#
- 1...Sa3
- 2.Re1#
- 1...Se3
- 2.Qe5#
- 1...Qb5!
- threat
- 1.Bd4?
- Keys
- 1.Rd7!
- threat
- 2.d3#
- 1...Qxc5+
- 2.Sxc5#
- 1...f3
- 2.Rh4#
- 1...Sd4
- 2.Qd5#
- 1...Qb5
- 2.Re7#
- 1...Qd6
- 2.Qxf5#
- 1...Rd4
- 2.Qxf5#
- 1...Sa1
- 2.Re1#
- 1...Se1
- 2.Rxe1#
- 1...Sa3
- 2.Re1#
- 1...Se3
- 2.Qe5#
- threat
- 1.Rd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(h);CHECK,XQ(H)::S(G),XQ(h)
- Q(h);N_PINQ(H)::QAB1(H),XP(f)
- Q(h);N_PINQ(H)::QAB1(H)
- R(c);N_PINQ(H)::QAB1(H),XP(f)
- B(j);N_GUARD::B(I),XP(f)
- S(b);N_GUARD,P_PINP(C)::R(B)
- S(b);N_GUARD,P_PINP(C)::R(B),XS(b)
- S(b);N_PINQ(H),P_PINP(C)::QAR1(H)
- P(e);OGATEB::R(B)
- Tries
- Try
- B(E);N_SPINQ(H)
- Threat
- DUALS(3)
- Vars
- S(b);P_PINP(C),XB(E)::S(G)
- Q(h);::S(G)
- R(c);::S(G)
- Refutation
- Q(h);P_PINB(E),XQ(H)
- Try
- R(B);CHECK
- Refutation
- S(b);P_PINP(C),XR(B)
- Try
- R(F);CHECK,N_SPINQ(H)
- Vars
- S(b);P_PINP(C),XR(F)::QAR1(H)
- Refutation
- P(e);CHECK,XR(F)
- Try
- R(F);CHECK,N_SPINQ(H)
- Vars
- R(c);XR(F)::QAB1(H),XP(f)
- Refutation
- S(b);P_PINP(C),XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- P(e);OGATEB::R(B)
- S(b);N_PINQ(H),P_PINP(C)::R1(F)
- Q(h);N_PINQ(H)::P(C)
- Q(h);N_PINQ(H)::R1(F)
- R(c);N_PINQ(H)::R1(F)
- P(i);::P(C)
- Refutation
- Q(h);CHECK,XQ(H)
- Try
- R(F);
- Threat
- P(C)
- Vars
- Q(h);CHECK,XQ(H)::S(G),XQ(h)
- Q(h);N_PINQ(H),XR(F)::QAB1(H),XP(f)
- P(e);OGATEB::R(B)
- S(b);N_PINQ(H),P_PINP(C)::QAB1(H)
- R(c);N_PINQ(H)::QAB1(H),XP(f)
- S(b);N_GUARD,P_PINP(C)::R(B)
- S(b);N_GUARD,P_PINP(C)::R(B),XS(b)
- S(b);N_PINQ(H),P_PINP(C)::QAR1(H)
- Refutation
- Q(h);N_PINQ(H)
- Try
- R(F);
- Threat
- P(C)
- Vars
- Q(h);CHECK,XQ(H)::S(G),XQ(h)
- P(e);OGATEB::R(B)
- S(b);N_PINQ(H),P_PINP(C)::QAB1(H)
- Q(h);N_PINQ(H)::QAB1(H),XP(f)
- R(c);N_PINQ(H)::QAB1(H),XP(f)
- S(b);N_GUARD,P_PINP(C)::R(B)
- S(b);N_GUARD,P_PINP(C)::R(B),XS(b)
- S(b);N_PINQ(H),P_PINP(C)::QAR1(H)
- Refutation
- Q(h);N_PINQ(H)
- Try
- Actual
- R(F);
- Threat
- P(C)
- Vars
- Q(h);CHECK,XQ(H)::S(G),XQ(h)
- P(e);OGATEB::R(B)
- S(b);N_PINQ(H),P_PINP(C)::QAB1(H)
- Q(h);N_GUARD,N_PINQ(H)::R(F)
- Q(h);N_PINQ(H)::QAB1(H),XP(f)
- R(c);N_PINQ(H)::QAB1(H),XP(f)
- S(b);N_GUARD,P_PINP(C)::R(B)
- S(b);N_GUARD,P_PINP(C)::R(B),XS(b)
- S(b);N_PINQ(H),P_PINP(C)::QAR1(H)
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).