MESON Chess Problem Database

Problem Display
PID: 44664 (2Bb2N1/n2P1pp1/4kp2/1pP2R2/2b1KPP1/1Q2p3/6N1/5r2 w - - 0 1)

van Pol, ?

Het Schaakleven, 1932

2Bb2N1/n2P1pp1/4kp2/1pP2R2/2b1KPP1/1Q2p3/6N1/5r2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4+
      • 2.Sxf4#
    • 1...Bd5+
      • 2.Qxd5#
    • 1...Ba5
      • 2.d8S#
    • 1...Bb6
      • 2.d8S#
    • 1...Bc7
      • 2.d8S#
    • 1...Be7
      • 2.d8S#
    • 1...Sxc8
      • 2.dxc8Q#
      • 2.dxc8B#
    • 1...b4
      • 2.Qxc4#
  • Tries
    • 1.Rxf6+?
      • 1...Bxf6
        • 2.d8S#
      • 1...gxf6!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Rd6#
      • 1...Rxf4+
        • 2.Sxf4#
      • 1...Bd3+
        • 2.Rxd3#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...f5+
        • 2.gxf5#
      • 1...Sxc8
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Rd1
        • 2.f5#
      • 1...Bc7
        • 2.d8S#
      • 1...Be7
        • 2.d8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(a);CHECK,XP(D)::S(A),XR(a)
    • B(c);CHECK,OGATE::QAB1(B),XB(c)
    • B(j);OGATE::P=S
    • S(g);OGATE,XB(I)::PXS(g)=Q
    • P(d);N_GUARD::QAB(B),XB(c)
  • Tries
    • Try
      • R(G);CHECK,XP(f)
      • Vars
        • B(j);OGATE,XR(G)::P=S
      • Refutation
        • P(i);XR(G)
  • Actual
    • R(G);N_PINB(c)
    • Threat
      • R1(G)
    • Vars
      • R(a);CHECK,XP(D)::S(A),XR(a)
      • B(c);CHECK,OGATEB::QAB(B)+R(G),XB(c)
      • B(c);CHECK,OGATE,P_SPINB(c),XR(G)::QAB1(B),XB(c)
      • P(f);CHECK,OGATE::P(E),XP(f)
      • S(g);OGATE,XB(I)::PXS(g)=Q
      • R(a);N_GUARD::P(D)
      • B(j);OGATE::P=S
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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).