MESON Chess Problem Database
Problem Display
PID: 16558 (8/3npN2/2R3p1/1p1k1pK1/4qRP1/2Q3p1/6B1/8 w - - 0 1)
Walters, S
Chess, 1941
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxg2
- 2.Rd4#
- 1...Qf3
- 2.Bxf3#
- 2.Rd4#
- 2.Qxf3#
- 1...Sc5
- 2.Qxc5#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Sf6
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b4
- 2.Qc4#
- 1...fxg4
- 2.Bxe4#
- 1...e5
- 2.Rd6#
- 1...e6
- 2.Rd6#
- 1...Qxg2
- Tries
- 1.Kh4?
- 1...Qxg2
- 2.Rd4#
- 1...fxg4
- 2.Bxe4#
- 1...Sc5
- 2.Qxc5#
- 1...Qf3
- 2.Bxf3#
- 2.Rd4#
- 2.Qxf3#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Sf6
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b4
- 2.Qc4#
- 1...e5
- 2.Rd6#
- 1...e6
- 2.Rd6#
- 1...g5+!
- 1...Qxg2
- 1.Kh6?
- 1...Qxg2
- 2.Rd4#
- 1...fxg4
- 2.Bxe4#
- 1...Sc5
- 2.Qxc5#
- 1...Qf3
- 2.Bxf3#
- 2.Rd4#
- 2.Qxf3#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Sf6
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b4
- 2.Qc4#
- 1...e5
- 2.Rd6#
- 1...e6
- 2.Rd6#
- 1...g5!
- 1...Qxg2
- 1.Bh1?
- 1...Qxh1
- 2.Rd4#
- 1...fxg4
- 2.Bxe4#
- 1...Sc5
- 2.Qxc5#
- 1...b4
- 2.Qc4#
- 1...Qg2
- 2.Bxg2#
- 2.Rd4#
- 1...Qf3
- 2.Bxf3#
- 2.Rd4#
- 2.Qxf3#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Sf6
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...e5
- 2.Rd6#
- 1...e6
- 2.Rd6#
- 1...g2!
- 1...Qxh1
- 1.Bf3?
- 1...Qxf3
- 2.Rd4#
- 2.Qxf3#
- 1...fxg4
- 2.Bxe4#
- 1...Sc5
- 2.Qxc5#
- 1...b4
- 2.Qc4#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Sf6
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...e5
- 2.Rd6#
- 1...e6
- 2.Rd6#
- 1...g2!
- 1...Qxf3
- 1.Rf1?
- threat
- 2.Rd1#
- 1...Qf3
- 2.Bxf3#
- 1...Sc5
- 2.Qxc5#
- 1...Se5
- 2.Qc5#
- 1...Qxg2!
- threat
- 1.Rf3?
- threat
- 2.Rd3#
- 1...Qe3+
- 2.Rxe3#
- 1...Qf4+
- 2.Rxf4#
- 1...Qxf3
- 2.Bxf3#
- 1...Qd3
- 2.Rxd3#
- 2.Rxf5#
- 1...Sc5
- 2.Qxc5#
- 1...Se5
- 2.Qc5#
- 1...Qxg4+!
- threat
- 1.Rxe4?
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rec4#
- 2.Rd4#
- 2.Rf4#
- 2.Re5#
- 2.Ree6#
- 2.Rxe7#
- 1...Sc5
- 2.Rd4#
- 2.Re5#
- 2.Rxc5#
- 2.Qxc5#
- 1...b4
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Rxb4#
- 2.Rec4#
- 2.Rd4#
- 2.Rf4#
- 2.Re5#
- 2.Ree6#
- 2.Rxe7#
- 2.Qc4#
- 1...Se5
- 2.Rd4#
- 2.Rxe5#
- 2.Qc5#
- 1...Sf6
- 2.Rd4#
- 2.Re5#
- 2.Rc5#
- 2.Qc5#
- 1...f4
- 2.Rd4#
- 2.Rxf4#
- 2.Re5#
- 1...e5
- 2.Rd4#
- 2.Rxe5#
- 2.Rd6#
- 1...e6
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Ra4#
- 2.Rb4#
- 2.Rec4#
- 2.Rd4#
- 2.Rf4#
- 2.Re5#
- 2.Rexe6#
- 2.Rd6#
- 1...fxe4!
- threat
- 1.Rxf5+?
- 1...Se5
- 2.Rxe5#
- 2.Qc5#
- 1...e5
- 2.Rd6#
- 1...gxf5!
- 1...Se5
- 1.gxf5?
- threat
- 2.Bxe4#
- 1...Qxg2
- 2.Rd4#
- 1...Sc5
- 2.Rxc5#
- 2.Qxc5#
- 1...Qf3
- 2.Bxf3#
- 2.Rd4#
- 2.Qxf3#
- 1...Sf6
- 2.Rc5#
- 2.Qc5#
- 1...gxf5!
- threat
- 1.Kh4?
- Keys
- 1.Qc2!
- 1...Kd4
- 2.Qd2#
- 1...Qxg2
- 2.Qxg2#
- 1...fxg4
- 2.Qxe4#
- 1...Sc5
- 2.Qxc5#
- 1...b4
- 2.Qc4#
- 1...Qf3
- 2.Bxf3#
- 1...Se5
- 2.Qc5#
- 1...Sb6
- 2.Qc5#
- 1...Sf6
- 2.Qc5#
- 1...Sb8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...e5
- 2.Rd6#
- 1...e6
- 2.Rd6#
- 1...Kd4
- 1.Qc2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(b);N_SPINQ(b),OGATE,XB(A)::R1(C)
- S(g);N_GUARD::QAR1(B),XS(g)
- S(g);N_GUARD::QAR1(B)
- P(c);N_GUARD::QAB1(B)
- P(e);N_GUARD,XP(D)::B(A),XQ(b)
- P(h);N_GUARD::R1(F)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(A)::R1(C)
- P(e);N_GUARD,XP(D)::B(A),XQ(b)
- S(g);N_GUARD::QAR1(B),XS(g)
- S(g);N_GUARD::QAR1(B)
- P(c);N_GUARD::QAB1(B)
- P(h);N_GUARD::R1(F)
- Refutation
- P(f);CHECK
- Try
- K(E);S_FLIGHT
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(A)::R1(C)
- P(e);N_GUARD,XP(D)::B(A),XQ(b)
- S(g);N_GUARD::QAR1(B),XS(g)
- S(g);N_GUARD::QAR1(B)
- P(c);N_GUARD::QAB1(B)
- P(h);N_GUARD::R1(F)
- Refutation
- P(f);
- Try
- B(A);
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(A)::R1(C)
- P(e);N_GUARD,XP(D)::B(A),XQ(b)
- S(g);N_GUARD::QAR1(B),XS(g)
- P(c);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAR1(B)
- P(h);N_GUARD::R1(F)
- Refutation
- P(a);N_SPINQ(b)
- Try
- B(A);
- Vars
- P(e);N_GUARD,XP(D)::B(A),XQ(b)
- S(g);N_GUARD::QAR1(B),XS(g)
- P(c);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAR1(B)
- P(h);N_GUARD::R1(F)
- Refutation
- P(a);
- Try
- R(C);
- Threat
- R(C)
- Vars
- Q(b);OGATEB::B(A),XQ(b)
- S(g);N_GUARD::QAR1(B),XS(g)
- S(g);N_GUARD::QAR1(B)
- Refutation
- Q(b);N_SPINQ(b),XB(A)
- Try
- R(C);N_PINQ(b)
- Threat
- R(C)
- Vars
- Q(b);CHECK,OGATEB::B(A)+R(C),XQ(b)
- Q(b);OGATE,P_SPINQ(b),XR(C)::B(A),XQ(b)
- S(g);N_GUARD::QAR1(B),XS(g)
- S(g);N_GUARD::QAR1(B)
- Refutation
- Q(b);CHECK,XP(D)
- Try
- R(C);XQ(b)
- Threat
- DUALS(11)
- Refutation
- P(e);P_SPINP(e),XR(C)
- Try
- R(C);CHECK,XP(e)
- Vars
- P(h);P_SPINP(h)::R1(F)
- Refutation
- P(f);XR(C)
- Try
- P(D);XP(e)
- Threat
- B(A),XQ(b)
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(A)::R1(C)
- Refutation
- P(f);XP(D)
- Try
- Actual
- Q(B);
- Vars
- K(d);P-FLIGHT::QAR2(B)
- Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(B),XQ(b)
- P(e);N_GUARD,XP(D)::QAB1(B),XQ(b)
- S(g);N_GUARD::QAR1(B),XS(g)
- P(c);N_GUARD::QAB1(B)
- Q(b);OGATEB::B(A),XQ(b)
- S(g);N_GUARD::QAR1(B)
- P(h);N_GUARD::R1(F)
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).