MESON Chess Problem Database
Problem Display
PID: 188536 (2r5/8/N1p1Nnp1/p1Pk1bR1/5p2/2r2P2/1BP1Q2p/1K2R2B w - - 0 1)
Howard, Archie D
To Alain White, 1945
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxc2
- 2.Sxf4#
- 2.Qd3#
- 1...Ra3
- 2.Sxf4#
- 1...Rb3
- 2.Sxf4#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sxf4#
- 1...Rxf3
- 2.Sxf4#
- 2.Rd1#
- 2.Qd3#
- 1...Rc4
- 2.Qe5#
- 1...Rxc5
- 2.Rd1#
- 2.Qd3#
- 1...Rc7
- 2.Saxc7#
- 1...Ra8
- 2.Sac7#
- 1...Rb8
- 2.Sac7#
- 1...Rd8
- 2.Sac7#
- 1...Re8
- 2.Sac7#
- 1...Rf8
- 2.Sac7#
- 1...Rg8
- 2.Sac7#
- 1...Rh8
- 2.Sac7#
- 1...Se4
- 2.Qxe4#
- 1...Sg4
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sg8
- 2.Qe4#
- 1...a4
- 2.Sb4#
- 1...Rxc2
- Tries
- 1.Ka1?
- 1...Rxc2
- 2.Sxf4#
- 2.Qd3#
- 1...Rxf3
- 2.Sxf4#
- 2.Rd1#
- 2.Qd3#
- 2.c4#
- 1...Rxc5
- 2.Rd1#
- 2.Qd3#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sxf4#
- 1...Se4
- 2.Qxe4#
- 1...Rb3
- 2.Sxf4#
- 2.c4#
- 1...Rc4
- 2.Qe5#
- 1...Rc7
- 2.Saxc7#
- 1...Ra8
- 2.Sac7#
- 1...Rb8
- 2.Sac7#
- 1...Rd8
- 2.Sac7#
- 1...Re8
- 2.Sac7#
- 1...Rf8
- 2.Sac7#
- 1...Rg8
- 2.Sac7#
- 1...Rh8
- 2.Sac7#
- 1...Sg4
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sg8
- 2.Qe4#
- 1...a4
- 2.Sb4#
- 1...Ra3+!
- 1...Rxc2
- 1.Kc1?
- 1...Rxf3
- 2.Sxf4#
- 2.Rd1#
- 2.Qd3#
- 2.c4#
- 1...Rxc5
- 2.Rd1#
- 2.Qd3#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sxf4#
- 1...Se4
- 2.Qxe4#
- 1...Ra3
- 2.Sxf4#
- 2.c4#
- 1...Rb3
- 2.Sxf4#
- 2.c4#
- 1...Rc4
- 2.Qe5#
- 1...Rc7
- 2.Saxc7#
- 1...Ra8
- 2.Sac7#
- 1...Rb8
- 2.Sac7#
- 1...Rd8
- 2.Sac7#
- 1...Re8
- 2.Sac7#
- 1...Rf8
- 2.Sac7#
- 1...Rg8
- 2.Sac7#
- 1...Rh8
- 2.Sac7#
- 1...Sg4
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sg8
- 2.Qe4#
- 1...a4
- 2.Sb4#
- 1...Rxc2+!
- 1...Rxf3
- 1.Ka2?
- 1...Rxc2
- 2.Sxf4#
- 2.Qd3#
- 1...Rxf3
- 2.Sxf4#
- 2.Rd1#
- 2.Qd3#
- 2.c4#
- 1...Rxc5
- 2.Rd1#
- 2.Qd3#
- 1...Rd3
- 2.Qxd3#
- 1...Re3
- 2.Sxf4#
- 1...Se4
- 2.Qxe4#
- 1...Rb3
- 2.Sxf4#
- 2.c4#
- 1...Rc4
- 2.Qe5#
- 1...Rc7
- 2.Saxc7#
- 1...Ra8
- 2.Sac7#
- 1...Rb8
- 2.Sac7#
- 1...Rd8
- 2.Sac7#
- 1...Re8
- 2.Sac7#
- 1...Rf8
- 2.Sac7#
- 1...Rg8
- 2.Sac7#
- 1...Rh8
- 2.Sac7#
- 1...Sg4
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sg8
- 2.Qe4#
- 1...a4
- 2.Sb4#
- 1...Ra3+!
- 1...Rxc2
- 1.Bxc3?
- threat
- 2.Sxf4#
- 2.Rd1#
- 2.Qd3#
- 1...Se4
- 2.Sxf4#
- 2.Qxe4#
- 1...Sh5
- 2.Rd1#
- 2.Qd3#
- 2.Qe4#
- 1...Rb8+!
- threat
- 1.Rf1?
- 1...Rxc2
- 2.Sxf4#
- 1...Rxf3
- 2.Sxf4#
- 2.Rd1#
- 1...Rxc5
- 2.Rd1#
- 1...Re3
- 2.Sxf4#
- 1...Se4
- 2.Qxe4#
- 1...Ra3
- 2.Sxf4#
- 1...Rb3
- 2.Sxf4#
- 1...Rc4
- 2.Qe5#
- 1...Rc7
- 2.Saxc7#
- 1...Ra8
- 2.Sac7#
- 1...Rb8
- 2.Sac7#
- 1...Rd8
- 2.Sac7#
- 1...Re8
- 2.Sac7#
- 1...Rf8
- 2.Sac7#
- 1...Rg8
- 2.Sac7#
- 1...Rh8
- 2.Sac7#
- 1...Sg4
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sg8
- 2.Qe4#
- 1...a4
- 2.Sb4#
- 1...Rd3!
- 1...Rxc2
- 1.Qd1+?
- 1...Rd3
- 2.Qxd3#
- 1...Kc4!
- 1...Rd3
- 1.Qc4+?
- 1...Rxc4
- 2.Re5#
- 1...Kxc4!
- 1...Rxc4
- 1.Qd2+?
- 1...Rd3
- 2.Qxd3#
- 1...Kc4!
- 1...Rd3
- 1.Ka1?
- Keys
- 1.Rc1!
- 1...Rxc2
- 2.Sxf4#
- 1...Rxf3
- 2.Sxf4#
- 2.Rd1#
- 1...Rxc5
- 2.Rd1#
- 1...Rd3
- 2.c4#
- 1...Re3
- 2.Sxf4#
- 1...Se4
- 2.Qxe4#
- 1...Ra3
- 2.Sxf4#
- 1...Rb3
- 2.Sxf4#
- 1...Rc4
- 2.Qe5#
- 1...Rc7
- 2.Saxc7#
- 1...Ra8
- 2.Sac7#
- 1...Rb8
- 2.Sac7#
- 1...Rd8
- 2.Sac7#
- 1...Re8
- 2.Sac7#
- 1...Rf8
- 2.Sac7#
- 1...Rg8
- 2.Sac7#
- 1...Rh8
- 2.Sac7#
- 1...Sg4
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...Sg8
- 2.Qe4#
- 1...a4
- 2.Sb4#
- 1...Rxc2
- 1.Rc1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(b);::S(K),XP(c)
- R(b);P_PINB(D)::S(K),XP(c)
- R(b);N_GUARD,N_PINP(E)::QAR2(F),XR(b)
- R(b);SBLOCK::QAR1(F)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- R(j);N_GUARD,P_PINB(D)::S(J)
- S(h);N_GUARD,N_PINP(E)::QAB1(F),XS(h)
- S(h);N_GUARD::QAB1(F)
- P(d);N_GUARD::S(J)
- Tries
- Try
- K(A);N_SPINP(E),P-FLIGHT
- Vars
- R(b);N_GUARD::QAR2(F),XR(b)
- R(b);::S(K),XP(c)
- S(h);N_GUARD::QAB1(F),XS(h)
- R(b);SBLOCK::QAR1(F)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- S(h);N_GUARD::QAB1(F)
- P(d);N_GUARD::S(J)
- Refutation
- R(b);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- R(b);N_GUARD,N_PINP(E)::QAR2(F),XR(b)
- R(b);N_PINP(E)::S(K),XP(c)
- S(h);N_GUARD::QAB1(F),XS(h)
- R(b);SBLOCK::QAR1(F)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- S(h);N_GUARD::QAB1(F)
- P(d);N_GUARD::S(J)
- Refutation
- R(b);CHECK,XP(E)
- Try
- K(A);N_SPINP(E),S_FLIGHT
- Vars
- R(b);N_GUARD::QAR2(F),XR(b)
- R(b);::S(K),XP(c)
- S(h);N_GUARD::QAB1(F),XS(h)
- R(b);SBLOCK::QAR1(F)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- S(h);N_GUARD::QAB1(F)
- P(d);N_GUARD::S(J)
- Refutation
- R(b);CHECK
- Try
- B(D);XR(b)
- Threat
- DUALS(3)
- Refutation
- R(j);CHECK
- Try
- R(B);
- Vars
- R(b);XP(E)::S(K),XP(c)
- R(b);N_GUARD,XP(H)::R(B)
- R(b);::S(K),XP(c)
- S(h);N_GUARD,N_PINP(E)::QAB1(F),XS(h)
- R(b);P_PINB(D)::S(K),XP(c)
- R(b);SBLOCK::QAR1(F)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- R(j);N_GUARD,P_PINB(D)::S(J)
- S(h);N_GUARD::QAB1(F)
- P(d);N_GUARD::S(J)
- Refutation
- R(b);N_PINP(E)
- Try
- Q(F);CHECK
- Vars
- R(b);N_GUARD,N_PINP(E),P_SPINR(b)::QAR2(F),XR(b)
- Refutation
- K(e);N_SPINB(f),S_FLIGHT
- Try
- Q(F);CHECK
- Vars
- R(b);SBLOCK,XQ(F)::R1(B)
- Refutation
- K(e);N_SPINB(f),S_FLIGHT,XQ(F)
- Try
- Q(F);CHECK
- Vars
- R(b);N_GUARD,N_PINP(E),P_SPINR(b)::QAR2(F),XR(b)
- Refutation
- K(e);N_SPINB(f),S_FLIGHT
- Try
- Actual
- R(B);
- Vars
- R(b);XP(E)::S(K),XP(c)
- R(b);N_GUARD,XP(H)::R(B)
- R(b);N_PINP(E)::P(E)
- R(b);::S(K),XP(c)
- S(h);N_GUARD,N_PINP(E)::QAB1(F),XS(h)
- R(b);P_PINB(D)::S(K),XP(c)
- R(b);SBLOCK::QAR1(F)
- R(j);N_GUARD::S(J),XR(j)
- R(j);N_GUARD::S(J)
- R(j);N_GUARD,P_PINB(D)::S(J)
- S(h);N_GUARD::QAB1(F)
- P(d);N_GUARD::S(J)
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).