MESON Chess Problem Database
Problem Display
PID: 50996 (B3R3/1r6/b1r2P2/3Nb1P1/2PPk1p1/2R2n2/3BN1n1/K6Q w - - 0 1)
Haring, Jacobus
The Spectator, 1957
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Rb1+
- 2.Qxb1#
- 1...Rb2
- 2.Qh7#
- 1...Rb3
- 2.Qh7#
- 1...Rb4
- 2.Qh7#
- 1...Rb5
- 2.Qh7#
- 1...Rb6
- 2.Qh7#
- 1...Ra7
- 2.Qb1#
- 1...Rc7
- 2.Qb1#
- 1...Rd7
- 2.Qb1#
- 1...Re7
- 2.Qb1#
- 1...Rf7
- 2.Qb1#
- 1...Rg7
- 2.Qb1#
- 1...Rh7
- 2.Qb1#
- 2.Qxh7#
- 1...Rb8
- 2.Qh7#
- 1...Bb5
- 2.Qb1#
- 1...Sge1
- 2.Rxe5#
- 1...Se3
- 2.Rxe5#
- 1...Sf4
- 2.Rxe5#
- 1...Sgh4
- 2.Rxe5#
- 1...Sfe1
- 2.Rxe5#
- 1...Sg1
- 2.Rxe5#
- 1...Sxd2
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Sxd4
- 2.Sg3#
- 1...Sfh4
- 2.Rxe5#
- 1...Sxg5
- 2.Rxe5#
- 1...Rb1+
- Tries
- 1.Sb4?
- threat
- 2.Qb1#
- 1...Kf5
- 2.Qb1#
- 1...Rxb4
- 2.Qh7#
- 1...Sxd2
- 2.Rxe5#
- 1...Sxd4
- 2.Sg3#
- 1...Sge1
- 2.Rxe5#
- 1...Se3
- 2.Rxe5#
- 1...Sf4
- 2.Rxe5#
- 1...Sfe1
- 2.Rxe5#
- 1...Sg1
- 2.Rxe5#
- 1...Bxc4!
- threat
- 1.Sb6?
- threat
- 2.Qb1#
- 1...Kf5
- 2.Qb1#
- 1...Rcxb6
- 2.Qh7#
- 1...Rbxb6
- 2.Qh7#
- 1...Sxd2
- 2.Rxe5#
- 1...Sxd4
- 2.Sg3#
- 1...Sge1
- 2.Rxe5#
- 1...Se3
- 2.Rxe5#
- 1...Sf4
- 2.Rxe5#
- 1...Sfe1
- 2.Rxe5#
- 1...Sg1
- 2.Rxe5#
- 1...Bxc4!
- threat
- 1.Bxb7?
- threat
- 2.Qb1#
- 2.Qh7#
- 1...Kf5
- 2.Qb1#
- 2.Qh7#
- 1...Rxf6
- 2.Qb1#
- 1...Sxd2
- 2.Rxe5#
- 2.Qh7#
- 1...Sxd4
- 2.Sg3#
- 1...Sxg5
- 2.Rxe5#
- 2.Qb1#
- 1...Rb6
- 2.Qh7#
- 1...Rc7
- 2.Qb1#
- 1...Sge1
- 2.Rxe5#
- 2.Qh7#
- 1...Se3
- 2.Rxe5#
- 1...Sf4
- 2.Rxe5#
- 1...Sgh4
- 2.Rxe5#
- 2.Qb1#
- 1...Sfe1
- 2.Rxe5#
- 2.Qh7#
- 1...Sg1
- 2.Rxe5#
- 2.Qh7#
- 1...Sh2
- 2.Rxe5#
- 2.Qb1#
- 1...Sfh4
- 2.Rxe5#
- 2.Qb1#
- 1...Bxc4!
- threat
- 1.Sb4?
- Keys
- 1.Sc7!
- threat
- 2.Qh7#
- 1...Rb1+
- 2.Qxb1#
- 1...Kf5
- 2.Qh7#
- 1...Rxf6
- 2.Qb1#
- 1...Rcxc7
- 2.Qb1#
- 1...Rbxc7
- 2.Qb1#
- 1...Sxd4
- 2.Sg3#
- 1...Sxg5
- 2.Rxe5#
- 1...Se3
- 2.Rxe5#
- 1...Sf4
- 2.Rxe5#
- 1...Sgh4
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Sfh4
- 2.Rxe5#
- threat
- 1.Sc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 16
- Sets
- R(h);CHECK,N_GUARD::QAB(B),XR(h)
- R(h);N_GUARD::QAB(B)
- R(h);N_GUARD,N_SPINB(e)::QAB(B)
- B(f);S_CUTR(h)::QAB(B)
- S(a);P_SPINS(b)::R1(L),XB(e)
- S(b);N_GUARD,P_SPINS(a)::R1(L),XB(e)
- S(b);N_GUARD,P_SPINS(a),XB(C)::R1(L),XB(e)
- S(b);P_SPINS(a),SBLOCK,XP(G)::S(D)
- S(b);N_GUARD,P_SPINS(a),XP(I)::R1(L),XB(e)
- Tries
- Try
- S(H);
- Threat
- QAB(B)
- Vars
- K(c);N_SPINB(e),S_FLIGHT::QAB(B)
- R(h);N_GUARD,P_SPINR(g),XS(H)::QAB(B)
- S(b);N_GUARD,P_SPINS(a),XB(C)::R1(L),XB(e)
- S(b);P_SPINS(a),SBLOCK,XP(G)::S(D)
- S(a);P_SPINS(b)::R1(L),XB(e)
- S(b);N_GUARD,P_SPINS(a)::R1(L),XB(e)
- Refutation
- B(f);XP(F)
- Try
- S(H);
- Threat
- QAB(B)
- Vars
- K(c);N_SPINB(e),S_FLIGHT::QAB(B)
- R(g);P_SPINR(h),XS(H)::QAB(B)
- R(h);N_GUARD,P_SPINR(g),XS(H)::QAB(B)
- S(b);N_GUARD,P_SPINS(a),XB(C)::R1(L),XB(e)
- S(b);P_SPINS(a),SBLOCK,XP(G)::S(D)
- S(a);P_SPINS(b)::R1(L),XB(e)
- S(b);N_GUARD,P_SPINS(a)::R1(L),XB(e)
- Refutation
- B(f);XP(F)
- Try
- B(K);XR(h)
- Threat
- DUALS(2)
- Vars
- R(g);XP(J)::QAB(B)
- S(b);P_SPINS(a),SBLOCK,XP(G)::S(D)
- R(g);::QAB(B)
- S(a);P_SPINS(b)::R1(L),XB(e)
- Refutation
- B(f);XP(F)
- Try
- Actual
- S(H);
- Threat
- QAB(B)
- Vars
- R(h);CHECK,N_GUARD,P_SPINR(g)::QAB(B),XR(h)
- K(c);N_SPINB(e),S_FLIGHT::QAB(B)
- R(g);P_SPINR(h),XP(J)::QAB(B)
- R(g);P_SPINR(h),XS(H)::QAB(B)
- R(h);N_GUARD,P_SPINR(g),XS(H)::QAB(B)
- S(b);P_SPINS(a),SBLOCK,XP(G)::S(D)
- S(b);N_GUARD,P_SPINS(a),XP(I)::R1(L),XB(e)
- S(a);P_SPINS(b)::R1(L),XB(e)
- S(b);N_GUARD,P_SPINS(a)::R1(L),XB(e)
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).