MESON Chess Problem Database
Problem Display
PID: 67896 (8/p4p2/R4r1p/2PBk2p/pPPN1r1P/B2p1pQN/3P1K1P/8 w - - 0 1)
Clark, Cecil Henry Douglas
Chess, 1949
#2
13 + 10
SOLUTION
- SOUND
- Sets
- 1...Kxd4
- 2.Bb2#
- 1...Rf5
- 2.Sxf3#
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rg6
- 2.Qxf4#
- 1...Kxd4
- Tries
- 1.Ke1?
- 1...Kxd4
- 2.Bb2#
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Sxf3#
- 1...Rg6
- 2.Qxf4#
- 1...f2+!
- 1...Kxd4
- 1.Kf1?
- 1...Kxd4
- 2.Bb2#
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Sxf3#
- 1...Rg6
- 2.Qxf4#
- 1...f2!
- 1...Kxd4
- 1.Ke3?
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Sxf3#
- 1...Rg6
- 2.Qxf4#
- 1...f2!
- 1...Rxa6
- 1.Sb5?
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Bb2#
- 1...Rg6
- 2.Qxf4#
- 1...Kf5!
- 1...Rxa6
- 1.Sc6+?
- 1...Rxc6
- 2.Qxf4#
- 1...Kf5!
- 1...Rxc6
- 1.Bc1?
- 1...Kxd4
- 2.Bb2#
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Sxf3#
- 1...Rg6
- 2.Qxf4#
- 1...a3!
- 1...Kxd4
- 1.Bb2?
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sc6#
- 2.Se6#
- 1...Rg6
- 2.Qxf4#
- 1...a3!
- 1...Rxa6
- 1.Bb7?
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Sxf3#
- 1...Rg6
- 2.Qxf4#
- 1...Kxd4!
- 1...Rxa6
- 1.Ba8?
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Sxf3#
- 1...Rg6
- 2.Qxf4#
- 1...Kxd4!
- 1...Rxa6
- 1.Re6+?
- 1...Kxd4
- 2.Bb2#
- 1...Rxe6
- 2.Qxf4#
- 1...fxe6!
- 1...Kxd4
- 1.Rxf6?
- threat
- 2.Qxf4#
- 1...Kxd4
- 2.Bb2#
- 2.Qxf4#
- 1...Kxf6!
- threat
- 1.Rxa7?
- 1...Kxd4
- 2.Bb2#
- 1...Ra6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rg6
- 2.Qxf4#
- 1...Rf5!
- 1...Kxd4
- 1.Qg5+?
- 1...Kxd4
- 2.Bb2#
- 1...R4f5
- 2.Sxf3#
- 2.Qe3#
- 1...R6f5
- 2.Sc6#
- 1...hxg5!
- 1...Kxd4
- 1.b5?
- 1...Rxa6
- 2.Qxf4#
- 1...Rb6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Rf5
- 2.Sxf3#
- 1...Rg6
- 2.Qxf4#
- 1...Kxd4!
- 1...Rxa6
- 1.Ke1?
- Keys
- 1.Qg7!
- 1...Kxd4
- 2.Bb2#
- 1...Rxd4
- 2.Qxf6#
- 1...Rxh4
- 2.Qxf6#
- 1...Re4
- 2.Qxf6#
- 1...Rg4
- 2.Qxf6#
- 1...Rf5
- 2.Sc6#
- 1...Kxd4
- 1.Qg7!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 7
- Sets
- K(e);N_SPINR(d),OGATEB,S_FLIGHT,XS(I)::B(D)
- R(g);SBLOCK::S(I),XP(b)
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- K(e);N_SPINR(d),OGATEB,S_FLIGHT,XS(I)::B(D)
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- R(g);SBLOCK::S(I),XP(b)
- Refutation
- P(b);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- K(e);N_SPINR(d),OGATEB,S_FLIGHT,XS(I)::B(D)
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- R(g);SBLOCK::S(I),XP(b)
- Refutation
- P(b);
- Try
- K(B);S_FLIGHT
- Vars
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- R(g);SBLOCK::S(I),XP(b)
- Refutation
- P(b);
- Try
- S(I);
- Vars
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- R(g);SBLOCK::B(D)
- Refutation
- K(e);N_SPINR(d),P-FLIGHT
- Try
- S(I);CHECK
- Vars
- R(g);XS(I)::QAB1(E),XR(d)
- Refutation
- K(e);N_SPINR(d),P-FLIGHT
- Try
- B(D);
- Vars
- K(e);N_SPINR(d),OGATEB,S_FLIGHT,XS(I)::B(D)
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- R(g);SBLOCK::S(I),XP(b)
- Refutation
- P(c);
- Try
- B(D);
- Vars
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- Refutation
- P(c);
- Try
- B(L);
- Vars
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- R(g);SBLOCK::S(I),XP(b)
- Refutation
- K(e);N_SPINR(d),S_FLIGHT,XS(I)
- Try
- B(L);
- Vars
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- R(g);SBLOCK::S(I),XP(b)
- Refutation
- K(e);N_SPINR(d),S_FLIGHT,XS(I)
- Try
- R(M);CHECK
- Vars
- K(e);N_SPINR(d),S_FLIGHT,XS(I)::B(D)
- R(g);XR(M)::QAB1(E),XR(d)
- Refutation
- P(j);XR(M)
- Try
- R(M);XR(g)
- Threat
- QAB1(E),XR(d)
- Refutation
- K(e);N_SPINR(d),S_FLIGHT,XR(M)
- Try
- R(M);XP(i)
- Vars
- K(e);N_SPINR(d),OGATEB,S_FLIGHT,XS(I)::B(D)
- R(g);N_GUARD::QAB1(E),XR(d)
- Refutation
- R(g);
- Try
- Q(E);CHECK,N_PINR(d)
- Vars
- K(e);S_FLIGHT,XS(I)::B(D)
- R(g);P_SPINR(g)::S(I)
- Refutation
- P(h);XQ(E)
- Try
- P(G);
- Vars
- R(g);N_GUARD,XR(M)::QAB1(E),XR(d)
- R(g);N_GUARD::QAB1(E),XR(d)
- R(g);SBLOCK::S(I),XP(b)
- Refutation
- K(e);N_SPINR(d),S_FLIGHT,XS(I)
- Try
- Actual
- Q(E);N_PINR(d),P_PINR(g)
- Vars
- K(e);OGATEB,S_FLIGHT,XS(I)::B(D)
- R(d);N_GUARD,SBLOCK,XS(I)::QAB1(E),XR(g)
- R(d);N_GUARD,XP(J)::QAB1(E),XR(g)
- R(d);N_GUARD::QAB1(E),XR(g)
- R(d);SBLOCK::S(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).