MESON Chess Problem Database
Problem Display
PID: 273396 (7B/1KN3nr/3bp2p/R2Bn3/3k2PR/r4p2/2Q2P2/2N4b w - - 0 1)
Easter, Norris
The Problemist, 1932
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sb3#
- 2.Qb2#
- 1...Ra2
- 2.Sb3#
- 1...Rb3+
- 2.Sxb3#
- 1...Rc3
- 2.Qe4#
- 1...Ra4
- 2.Sb3#
- 2.Qb2#
- 1...Rxa5
- 2.Sb3#
- 1...Bc5
- 2.Qxc5#
- 1...Bxc7
- 2.Qc5#
- 1...Sf5
- 2.Qc4#
- 2.gxf5#
- 1...Sh5
- 2.Qc4#
- 2.gxh5#
- 1...Se8
- 2.Qc4#
- 2.g5#
- 1...exd5
- 2.Sb5#
- 2.Rxd5#
- 1...Ra1
- Tries
- 1.Bxf3?
- threat
- 2.Se2#
- 2.Sb5#
- 1...Rb3+
- 2.Sxb3#
- 1...Rxf3
- 2.Se2#
- 1...Rxa5
- 2.Se2#
- 2.Sb3#
- 1...Bxc7
- 2.Se2#
- 2.Qc5#
- 1...Sxf3
- 2.Se2#
- 2.Sxe6#
- 1...Sxg4
- 2.Se2#
- 2.Sxe6#
- 1...Rc3
- 2.Qe4#
- 1...Re3
- 2.Sb5#
- 1...Sd3
- 2.Se2#
- 2.Sxe6#
- 1...Sc4
- 2.Se2#
- 2.Sxe6#
- 1...Sc6
- 2.Se2#
- 2.Sxe6#
- 1...Sg6
- 2.Se2#
- 2.Sxe6#
- 1...Sd7
- 2.Se2#
- 2.Sxe6#
- 1...Sf7
- 2.Se2#
- 2.Sxe6#
- 1...Sf5
- 2.Se2#
- 2.gxf5#
- 1...Sh5
- 2.Se2#
- 2.gxh5#
- 1...Se8
- 2.Se2#
- 2.g5#
- 1...Bxf3+!
- threat
- 1.Bxg7?
- threat
- 2.Sxe6#
- 2.Qc4#
- 2.g5#
- 1...Rb3+
- 2.Sxb3#
- 1...Rxa5
- 2.Sb3#
- 2.Qc4#
- 2.g5#
- 1...Bxc7
- 2.Qc4#
- 2.Qc5#
- 2.g5#
- 1...exd5
- 2.Sb5#
- 2.Se6#
- 2.Rxd5#
- 2.g5#
- 1...Rc3
- 2.Sxe6#
- 2.Qe4#
- 2.g5#
- 1...Re3
- 2.Sxe6#
- 2.Qc4#
- 1...Ra4
- 2.Sb3#
- 2.Sxe6#
- 2.Qd3#
- 2.Qb2#
- 2.Qd2#
- 2.g5#
- 1...Bc5
- 2.Qc4#
- 2.Qxc5#
- 2.g5#
- 1...Rxg7!
- threat
- 1.Qd2+?
- 1...Rd3
- 2.Sb3#
- 1...Sd3!
- 1...Rd3
- 1.Bxf3?
- Keys
- 1.Bc6!
- threat
- 2.Sb5#
- 1...Rb3+
- 2.Sxb3#
- 1...Rxa5
- 2.Sb3#
- 1...Bxc7
- 2.Qc5#
- 1...Sxg4
- 2.Sxe6#
- 1...Sxc6
- 2.Sxe6#
- 1...Rc3
- 2.Qe4#
- 1...Sd3
- 2.Sxe6#
- 1...Sc4
- 2.Sxe6#
- 1...Sg6
- 2.Sxe6#
- 1...Sd7
- 2.Sxe6#
- 1...Sf7
- 2.Sxe6#
- 1...Sf5
- 2.gxf5#
- 1...Sh5
- 2.gxh5#
- 1...Se8
- 2.g5#
- threat
- 1.Bc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 2
- Sets
- R(b);N_GUARD::S(A)
- R(b);CHECK,N_GUARD::S(A),XR(b)
- R(b);SBLOCK::QAR1(B)
- R(b);N_GUARD,XR(F)::S(A)
- B(f);N_GUARD::QAB1(B),XB(f)
- B(f);N_GUARD,XS(I)::QAB1(B)
- Tries
- Try
- B(G);P_SPINB(G),XP(c)
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,N_GUARD::S(A),XR(b)
- R(b);XB(G)::S(A)
- R(b);SBLOCK::QAR1(B)
- R(b);::S(I)
- Refutation
- B(a);CHECK,XB(G)
- Try
- B(J);P_PINS(e),XS(i)
- Threat
- DUALS(3)
- Vars
- R(b);CHECK,N_GUARD::S(A),XR(b)
- Refutation
- R(j);N_SPINS(e),P_PINS(I),XB(J)
- Try
- Q(B);CHECK
- Vars
- R(b);P_SPINR(b)::S(A)
- Refutation
- S(e);P_SPINS(e)
- Try
- Actual
- B(G);
- Threat
- S(I)
- Vars
- R(b);CHECK,N_GUARD::S(A),XR(b)
- R(b);N_GUARD,XR(F)::S(A)
- B(f);N_GUARD,XS(I)::QAB1(B)
- S(e);P_SPINS(e),S_CUTS(i),XP(D)::S(I),XP(g)
- S(e);P_SPINS(i),XB(G)::S(I),XP(g)
- R(b);SBLOCK::QAR1(B)
- S(e);P_SPINS(i)::S(I),XP(g)
- S(i);OGATE,P_PINS(I),P_SPINS(e)::R(E)+P(D),XS(i)
- S(i);P_PINS(I),P_SPINS(e)::R(E)+P(D)
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).