MESON Chess Problem Database
Problem Display
PID: 274192 (B3K3/3p2B1/2Nbp1N1/7Q/Rn1nk3/1P2pR2/2P1p3/8 w - - 0 1)
Groeneveld, Cornelis
Probleemblad, 1953
#2
10 + 8
SOLUTION
- SOUND
- Sets
- 1...Bf4
- 2.Rxf4#
- 1...Bc5
- 2.Rf4#
- 1...Be7
- 2.Rf4#
- 1...Bf8
- 2.Rf4#
- 1...Sa2
- 2.Sxd4#
- 2.Sa5#
- 2.Sce5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 2.Rxd4#
- 1...Sbxc2
- 2.Sce5#
- 1...Sd3
- 2.Sxd4#
- 2.Sa5#
- 2.Sce5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 2.Rxd4#
- 1...Sd5
- 2.Rxd4#
- 1...Sa6
- 2.Sxd4#
- 2.Sa5#
- 2.Sce5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 2.Rxd4#
- 1...Sbxc6
- 2.Rxd4#
- 1...Sdxc2
- 2.Sxb4#
- 1...Sxb3
- 2.Sxb4#
- 2.Sa5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 1...Sxf3
- 2.Sxb4#
- 2.Sa5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 1...Sb5
- 2.Sxb4#
- 2.Sa5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 1...Sf5
- 2.Sxb4#
- 2.Sa5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 1...Bf4
- Tries
- 1.Sa5+?
- 1...Sd5
- 2.Rxd4#
- 1...Sbc6
- 2.Rxd4#
- 1...Sdc6!
- 1...Sd5
- 1.Sa7+?
- 1...Sd5
- 2.Rxd4#
- 1...Sbc6
- 2.Rxd4#
- 1...Sdc6!
- 1...Sd5
- 1.Sce7+?
- 1...Sd5
- 2.Rxd4#
- 1...Sbc6
- 2.Rxd4#
- 1...Sdc6!
- 1...Sd5
- 1.Sb8+?
- 1...Sd5
- 2.Rxd4#
- 1...Sbc6
- 2.Rxd4#
- 1...Sdc6!
- 1...Sd5
- 1.Sd8+?
- 1...Sd5
- 2.Rxd4#
- 1...Sbc6
- 2.Rxd4#
- 1...Sdc6!
- 1...Sd5
- 1.Rxb4?
- threat
- 2.Sxd4#
- 2.Sa5#
- 2.Sce5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 2.Rxd4#
- 1...Bxb4
- 2.Rf4#
- 1...dxc6
- 2.Bxc6#
- 2.Rxd4#
- 1...e5
- 2.Sxd4#
- 2.Sa5#
- 2.Scxe5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 1...Bh2
- 2.Rxd4#
- 1...Bg3
- 2.Rxd4#
- 1...Bf4
- 2.Rxf4#
- 2.Rxd4#
- 1...Bc5
- 2.Rf4#
- 1...Bc7
- 2.Rxd4#
- 1...Be7
- 2.Rf4#
- 2.Rxd4#
- 1...Bb8
- 2.Rxd4#
- 1...Bf8
- 2.Rf4#
- 2.Rxd4#
- 1...Be5!
- threat
- 1.Qg4+?
- 1...Kd5
- 2.Qxd4#
- 1...Bf4!
- 1...Kd5
- 1.Qh4+?
- 1...Kxf3
- 2.Sxd4#
- 2.Sce5#
- 1...Kd5
- 2.Qxd4#
- 1...Bf4!
- 1...Kxf3
- 1.Qf5+?
- 1...Sxf5
- 2.Sxb4#
- 2.Sa5#
- 2.Sa7#
- 2.Sce7#
- 2.Sb8#
- 2.Sd8#
- 1...exf5!
- 1...Sxf5
- 1.Sa5+?
- Keys
- 1.Qh1!
- threat
- 2.Rf4#
- 1...Kd5
- 2.Rf5#
- 1...Sbxc2
- 2.Sce5#
- 1...Sdxc2
- 2.Sxb4#
- 1...Sxf3
- 2.Sce7#
- 1...Bf4
- 2.Rxf4#
- threat
- 1.Qh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- B(f);N_GUARD::R1(C),XB(f)
- B(f);N_GUARD::R1(C)
- S(c);N_GUARD,P_SPINS(d),XP(A)::B(I)+S(F)
- S(c);OGATE,P_SPINS(d)::R1(D),XS(d)
- S(c);OGATE,P_SPINS(d),XS(F)::R1(D),XS(d)
- S(d);N_GUARD,P_SPINS(c),XP(A)::B(I)+S(F),XS(c)
- Tries
- Try
- S(F);CHECK
- Vars
- S(c);OGATE,P_SPINS(d)::R1(D),XS(d)
- Refutation
- S(d);P_SPINS(c)
- Try
- S(F);CHECK
- Vars
- S(c);OGATE,P_SPINS(d)::R1(D),XS(d)
- Refutation
- S(d);P_SPINS(c)
- Try
- S(F);CHECK
- Vars
- S(c);OGATE,P_SPINS(d)::R1(D),XS(d)
- Refutation
- S(d);P_SPINS(c)
- Try
- S(F);CHECK
- Vars
- S(c);OGATE,P_SPINS(d)::R1(D),XS(d)
- Refutation
- S(d);P_SPINS(c)
- Try
- S(F);CHECK
- Vars
- S(c);OGATE,P_SPINS(d)::R1(D),XS(d)
- Refutation
- S(d);P_SPINS(c)
- Try
- R(D);P_PINS(d),XS(c)
- Threat
- DUALS(8)
- Vars
- B(f);N_GUARD,N_SPINS(d),XR(D)::R1(C)
- B(f);::R1(D),XS(d)
- B(f);N_GUARD::R1(C)
- Refutation
- B(f);
- Try
- Q(E);CHECK
- Vars
- K(e);OGATE,S_FLIGHT::QAR1(E),XS(d)
- Refutation
- B(f);P_SPINB(f)
- Try
- Q(E);CHECK
- Vars
- K(e);OGATE,S_FLIGHT::QAR1(E),XS(d)
- Refutation
- B(f);P_SPINB(f)
- Try
- Q(E);CHECK
- Refutation
- P(g);XQ(E)
- Try
- Actual
- Q(E);
- Threat
- QAB(E)+R(C),DCHECK
- Vars
- K(e);N_GUARD,S_FLIGHT::QAB(E)+R(C),DCHECK
- S(c);N_GUARD,P_SPINS(d),XP(A)::B(I)+S(F)
- S(d);N_GUARD,P_SPINS(c),XP(A)::B(I)+S(F),XS(c)
- S(d);N_GUARD,P_SPINS(d),S_CUTS(c),S_CUTS(c),XR(C)::B(I)+S(F)
- B(f);::QAB(E)+R(C),DCHECK,XB(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).