MESON Chess Problem Database
Problem Display
PID: 147197 (8/4N2p/2Pppp1P/NQP1kp2/3b3R/2rPpnP1/2p1RP2/2K5 w - - 0 1)
Coward, John R
3rd HM., BCF, 1952-1953
#2
12 + 11
| 14868 | Pirnie Collection | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Sc4#
- 1...Rb3
- 2.Sc4#
- 1...Rxd3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Rxc5
- 2.Sc4#
- 1...Bxc5
- 2.Rxe3#
- 1...Se1
- 2.f4#
- 1...Sg1
- 2.f4#
- 1...Sd2
- 2.f4#
- 1...Sh2
- 2.f4#
- 1...Sxh4
- 2.f4#
- 1...Sg5
- 2.f4#
- 1...f4
- 2.gxf4#
- 1...dxc5
- 2.Qb8#
- 1...d5
- 2.Qb8#
- 1...Ra3
- Tries
- 1.Re1?
- 1...Rxd3
- 2.Sc4#
- 1...Rxc5
- 2.Sc4#
- 1...Bxc5
- 2.Rxe3#
- 1...Sxe1
- 2.f4#
- 1...Sxh4
- 2.f4#
- 1...dxc5
- 2.Qb8#
- 1...Ra3
- 2.Sc4#
- 1...Rb3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Sg1
- 2.f4#
- 1...Sd2
- 2.f4#
- 1...Sh2
- 2.f4#
- 1...Sg5
- 2.f4#
- 1...f4
- 2.gxf4#
- 1...d5
- 2.Qb8#
- 1...e2!
- 1...Rxd3
- 1.Rg4?
- 1...Rxd3
- 2.Sc4#
- 1...Rxc5
- 2.Sc4#
- 1...Bxc5
- 2.Rxe3#
- 1...dxc5
- 2.Qb8#
- 1...Ra3
- 2.Sc4#
- 1...Rb3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Se1
- 2.f4#
- 1...Sg1
- 2.f4#
- 1...Sd2
- 2.f4#
- 1...Sh2
- 2.f4#
- 1...Sh4
- 2.f4#
- 1...Sg5
- 2.f4#
- 1...f4
- 2.gxf4#
- 1...d5
- 2.Qb8#
- 1...fxg4!
- 1...Rxd3
- 1.Qb4?
- 1...Rxd3
- 2.Sc4#
- 1...Bxc5
- 2.Qf4#
- 1...Sxh4
- 2.f4#
- 1...dxc5
- 2.Qb8#
- 1...Ra3
- 2.Sc4#
- 1...Rb3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Se1
- 2.Qxd4#
- 2.f4#
- 1...Sg1
- 2.Qxd4#
- 2.f4#
- 1...Sd2
- 2.Qxd4#
- 2.f4#
- 1...Sh2
- 2.Qxd4#
- 2.f4#
- 1...Sg5
- 2.Qxd4#
- 2.f4#
- 1...f4
- 2.gxf4#
- 1...d5
- 2.Qb8#
- 1...Rxc5!
- 1...Rxd3
- 1.Re1?
- Keys
- 1.Qb2!
- 1...Rxd3
- 2.Sc4#
- 1...Rxc5
- 2.Rxe3#
- 1...Bxc5
- 2.Sc4#
- 1...Sxh4
- 2.f4#
- 1...dxc5
- 2.Qb8#
- 1...Ra3
- 2.Sc4#
- 2.Rxe3#
- 1...Rb3
- 2.Sc4#
- 2.Rxe3#
- 1...Rc4
- 2.Sxc4#
- 2.Rxe3#
- 1...Se1
- 2.f4#
- 1...Sg1
- 2.f4#
- 1...Sd2
- 2.f4#
- 1...Sh2
- 2.f4#
- 1...Sg5
- 2.f4#
- 1...f4
- 2.gxf4#
- 1...d5
- 2.Qb8#
- 1...Rxd3
- 1.Qb2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- R(b);N_GUARD::S(G)
- R(b);N_GUARD,XP(D)::S(G)
- R(b);N_GUARD::S(G),XR(b)
- R(b);N_GUARD,P_SPINR(b),XP(I)::S(G)
- B(e);N_GUARD,P_SPINB(e),XP(I)::R(B),XP(c)
- S(d);OGATE::P(C)
- S(d);OGATE,XR(F)::P(C)
- P(g);OGATE::P(E),XP(g)
- P(h);OGATEB,XP(I)::QAB(H)
- P(h);OGATEB::QAB(H)
- Tries
- Try
- R(B);
- Vars
- R(b);N_GUARD,XP(D)::S(G)
- R(b);N_GUARD,P_SPINR(b),XP(I)::S(G)
- B(e);N_GUARD,P_SPINB(e),XP(I)::R(B),XP(c)
- S(d);N_SPINP(c),OGATE,XR(B)::P(C)
- S(d);OGATE,XR(F)::P(C)
- P(h);OGATEB,XP(I)::QAB(H)
- R(b);N_GUARD::S(G)
- R(b);N_GUARD::S(G),XR(b)
- S(d);OGATE::P(C)
- P(g);OGATE::P(E),XP(g)
- P(h);OGATEB::QAB(H)
- Refutation
- P(c);
- Try
- R(F);
- Vars
- R(b);N_GUARD,XP(D)::S(G)
- R(b);N_GUARD,P_SPINR(b),XP(I)::S(G)
- B(e);N_GUARD,P_SPINB(e),XP(I)::R(B),XP(c)
- P(h);OGATEB,XP(I)::QAB(H)
- R(b);N_GUARD::S(G)
- R(b);N_GUARD::S(G),XR(b)
- S(d);OGATE::P(C)
- P(g);OGATE::P(E),XP(g)
- P(h);OGATEB::QAB(H)
- Refutation
- P(g);XR(F)
- Try
- Q(H);
- Vars
- R(b);N_GUARD,XP(D)::S(G)
- B(e);OGATE,XP(I)::QAB1(H)
- S(d);OGATE,XR(F)::P(C)
- P(h);OGATEB,XP(I)::QAB(H)
- R(b);N_GUARD::S(G)
- R(b);N_GUARD::S(G),XR(b)
- P(g);OGATE::P(E),XP(g)
- P(h);OGATEB::QAB(H)
- Refutation
- R(b);XP(I)
- Try
- Actual
- Q(H);
- Vars
- R(b);N_GUARD,P_SPINB(e),XP(D)::S(G)
- R(b);P_SPINB(e),XP(I)::R(B),XP(c)
- B(e);P_SPINR(b),XP(I)::S(G)
- S(d);OGATE,XR(F)::P(C)
- P(h);OGATEB,XP(I)::QAB(H)
- S(d);OGATE::P(C)
- P(g);OGATE::P(E),XP(g)
- P(h);OGATEB::QAB(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).