MESON Chess Problem Database
Problem Display
PID: 16546 (8/2n5/2pR1pn1/3pkN2/3N3p/2r2Q1K/2p1P3/2B1R3 w - - 0 1)
Rudd, Charles Dember
Chess, 1941
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Sxc6#
- 1...Rb3
- 2.Sxc6#
- 1...Rd3
- 2.Sxc6#
- 2.exd3#
- 1...Re3
- 2.Sxc6#
- 2.Qxe3#
- 1...Rxf3+
- 2.exf3#
- 1...Rc4
- 2.Qe3#
- 1...Rc5
- 2.Qe3#
- 1...Sf4+
- 2.Bxf4#
- 1...Se7
- 2.Bf4#
- 1...Sf8
- 2.Bf4#
- 1...Sh8
- 2.Bf4#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...c5
- 2.Sc6#
- 1...Ra3
- Tries
- 1.Kg2?
- 1...Sf4+
- 2.Bxf4#
- 2.Qxf4#
- 1...Rxf3
- 2.exf3#
- 1...Ra3
- 2.Sxc6#
- 1...Rb3
- 2.Sxc6#
- 1...Rd3
- 2.Sxc6#
- 2.exd3#
- 1...Re3
- 2.Sxc6#
- 2.Qxe3#
- 1...Rc4
- 2.Qe3#
- 1...Rc5
- 2.Qe3#
- 1...Se7
- 2.Bf4#
- 2.Qf4#
- 1...Sf8
- 2.Bf4#
- 2.Qf4#
- 1...Sh8
- 2.Bf4#
- 2.Qf4#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...c5
- 2.Sc6#
- 1...h3+!
- 1...Sf4+
- 1.Kh2?
- 1...Rxf3
- 2.exf3#
- 1...Ra3
- 2.Sxc6#
- 1...Rb3
- 2.Sxc6#
- 1...Rd3
- 2.Sxc6#
- 2.exd3#
- 1...Re3
- 2.Sxc6#
- 2.Qxe3#
- 1...Rc4
- 2.Qe3#
- 1...Rc5
- 2.Qe3#
- 1...Sf4
- 2.Bxf4#
- 2.Qxf4#
- 1...Se7
- 2.Bf4#
- 2.Qf4#
- 1...Sf8
- 2.Bf4#
- 2.Qf4#
- 1...Sh8
- 2.Bf4#
- 2.Qf4#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...c5
- 2.Sc6#
- 1...h3!
- 1...Rxf3
- 1.Kg4?
- 1...Rxf3
- 2.exf3#
- 1...Ra3
- 2.Sxc6#
- 1...Rb3
- 2.Sxc6#
- 1...Rd3
- 2.Sxc6#
- 2.exd3#
- 1...Re3
- 2.Sxc6#
- 2.Qxe3#
- 1...Rc4
- 2.Qe3#
- 1...Rc5
- 2.Qe3#
- 1...Sf4
- 2.Bxf4#
- 2.Qxf4#
- 1...Se7
- 2.Bf4#
- 2.Qf4#
- 1...Sf8
- 2.Bf4#
- 2.Qf4#
- 1...Sh8
- 2.Bf4#
- 2.Qf4#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...c5
- 2.Sc6#
- 1...h3!
- 1...Rxf3
- 1.Bg5?
- threat
- 2.Bxf6#
- 1...Rxf3+
- 2.exf3#
- 1...Sf4+
- 2.Bxf4#
- 1...Se6
- 2.Rxe6#
- 1...Se8
- 2.Re6#
- 1...fxg5!
- threat
- 1.Rf1?
- 1...Sf4+
- 2.Bxf4#
- 1...Ra3
- 2.Sxc6#
- 1...Rb3
- 2.Sxc6#
- 1...Rd3
- 2.Sxc6#
- 1...Re3
- 2.Sxc6#
- 2.Qxe3#
- 1...Rc4
- 2.Qe3#
- 1...Rc5
- 2.Qe3#
- 1...Se7
- 2.Bf4#
- 1...Sf8
- 2.Bf4#
- 1...Sh8
- 2.Bf4#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...c5
- 2.Sc6#
- 1...Rxf3+!
- 1...Sf4+
- 1.Rg1?
- 1...Sf4+
- 2.Bxf4#
- 1...Ra3
- 2.Sxc6#
- 1...Rb3
- 2.Sxc6#
- 1...Rd3
- 2.Sxc6#
- 1...Re3
- 2.Sxc6#
- 2.Qxe3#
- 1...Rc4
- 2.Qe3#
- 1...Rc5
- 2.Qe3#
- 1...Se7
- 2.Bf4#
- 1...Sf8
- 2.Bf4#
- 1...Sh8
- 2.Bf4#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...c5
- 2.Sc6#
- 1...Rxf3+!
- 1...Sf4+
- 1.Rh1?
- 1...Sf4+
- 2.Bxf4#
- 1...Ra3
- 2.Sxc6#
- 1...Rb3
- 2.Sxc6#
- 1...Rd3
- 2.Sxc6#
- 1...Re3
- 2.Sxc6#
- 2.Qxe3#
- 1...Rc4
- 2.Qe3#
- 1...Rc5
- 2.Qe3#
- 1...Se7
- 2.Bf4#
- 1...Sf8
- 2.Bf4#
- 1...Sh8
- 2.Bf4#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...c5
- 2.Sc6#
- 1...Rxf3+!
- 1...Sf4+
- 1.Qxc3?
- threat
- 2.Qe3#
- 1...Ke4
- 2.Qe3#
- 1...Sf4+!
- threat
- 1.Qd3?
- threat
- 2.Sf3#
- 1...Rxd3+
- 2.exd3#
- 1...Sf4+!
- threat
- 1.Kg2?
- Keys
- 1.e4!
- 1...Rxf3+
- 2.Sxf3#
- 1...Sf4+
- 2.Bxf4#
- 1...dxe4
- 2.Rxe4#
- 1...Ra3
- 2.Sxc6#
- 1...Rb3
- 2.Sxc6#
- 1...Rd3
- 2.Sxc6#
- 1...Re3
- 2.Sxc6#
- 1...Rc4
- 2.exd5#
- 1...Rc5
- 2.exd5#
- 1...Se7
- 2.Bf4#
- 1...Sf8
- 2.Bf4#
- 1...Sh8
- 2.Bf4#
- 1...Sb5
- 2.Re6#
- 1...Sa6
- 2.Re6#
- 1...Se6
- 2.Rxe6#
- 1...Sa8
- 2.Re6#
- 1...Se8
- 2.Re6#
- 1...c5
- 2.Sc6#
- 1...Rxf3+
- 1.e4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::S(F),XP(f)
- R(b);CHECK,OGATE,XQ(D)::R(B)+P(C),XR(b)
- R(b);N_GUARD,N_PINQ(D)::QAR2(D)
- S(h);CHECK,N_GUARD::B(A),XS(h)
- S(h);N_GUARD::B(A)
- S(i);N_GUARD::R1(H)
- S(i);N_GUARD::R1(H),XS(i)
- P(f);S_CUTR(b)::S(F)
- Tries
- Try
- K(E);N_SPINQ(D),S_FLIGHT
- Vars
- R(b);OGATE,XQ(D)::R(B)+P(C),XR(b)
- R(b);N_GUARD::S(F),XP(f)
- R(b);N_GUARD::QAR2(D)
- S(i);N_GUARD::R1(H)
- S(i);N_GUARD::R1(H),XS(i)
- P(f);S_CUTR(b)::S(F)
- Refutation
- P(c);CHECK
- Try
- K(E);N_SPINQ(D),P-FLIGHT
- Vars
- R(b);OGATE,XQ(D)::R(B)+P(C),XR(b)
- R(b);N_GUARD::S(F),XP(f)
- R(b);N_GUARD::QAR2(D)
- S(i);N_GUARD::R1(H)
- S(i);N_GUARD::R1(H),XS(i)
- P(f);S_CUTR(b)::S(F)
- Refutation
- P(c);
- Try
- K(E);N_SPINQ(D),S_FLIGHT
- Vars
- R(b);OGATE,XQ(D)::R(B)+P(C),XR(b)
- R(b);N_GUARD::S(F),XP(f)
- R(b);N_GUARD,P_PINS(F)::QAR2(D)
- R(b);N_GUARD::QAR2(D)
- S(i);N_GUARD::R1(H)
- S(i);N_GUARD::R1(H),XS(i)
- P(f);S_CUTR(b)::S(F)
- Refutation
- P(c);
- Try
- B(A);
- Threat
- B(A),XP(g)
- Vars
- R(b);CHECK,OGATE,XQ(D)::R(B)+P(C),XR(b)
- S(h);CHECK,N_GUARD::B(A),XS(h)
- S(i);N_GUARD::R1(H),XS(i)
- S(i);N_GUARD::R1(H)
- Refutation
- P(g);XB(A)
- Try
- R(B);
- Vars
- S(h);CHECK,N_GUARD::B(A),XS(h)
- R(b);N_GUARD::S(F),XP(f)
- R(b);N_GUARD,N_PINQ(D)::QAR2(D)
- S(h);N_GUARD::B(A)
- S(i);N_GUARD::R1(H)
- S(i);N_GUARD::R1(H),XS(i)
- P(f);S_CUTR(b)::S(F)
- Refutation
- R(b);CHECK,XQ(D)
- Try
- R(B);
- Vars
- S(h);CHECK,N_GUARD::B(A),XS(h)
- R(b);N_GUARD::S(F),XP(f)
- R(b);N_GUARD,N_PINQ(D)::QAR2(D)
- S(h);N_GUARD::B(A)
- S(i);N_GUARD::R1(H)
- S(i);N_GUARD::R1(H),XS(i)
- P(f);S_CUTR(b)::S(F)
- Refutation
- R(b);CHECK,XQ(D)
- Try
- R(B);
- Vars
- S(h);CHECK,N_GUARD::B(A),XS(h)
- R(b);N_GUARD::S(F),XP(f)
- R(b);N_GUARD,N_PINQ(D)::QAR2(D)
- S(h);N_GUARD::B(A)
- S(i);N_GUARD::R1(H)
- S(i);N_GUARD::R1(H),XS(i)
- P(f);S_CUTR(b)::S(F)
- Refutation
- R(b);CHECK,XQ(D)
- Try
- Q(D);N_SPINQ(D),XR(b)
- Threat
- QAR2(D)
- Vars
- K(e);P-FLIGHT::QAR1(D)
- Refutation
- S(h);CHECK
- Try
- Q(D);
- Threat
- S(F)
- Vars
- R(b);CHECK,OGATE,XQ(D)::R(B)+P(C),XR(b)
- Refutation
- S(h);CHECK
- Try
- Actual
- P(C);
- Vars
- R(b);CHECK,XQ(D)::S(F),XR(b)
- S(h);CHECK,N_GUARD::B(A),XS(h)
- P(d);OGATE,P_SPINP(d),XP(C)::R1(B),XP(d)
- R(b);N_GUARD::S(F),XP(f)
- R(b);N_GUARD,N_PINQ(D)::R(B)+P(C),XP(d)
- S(h);N_GUARD::B(A)
- S(i);N_GUARD::R1(H)
- S(i);N_GUARD::R1(H),XS(i)
- P(f);S_CUTR(b)::S(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).