MESON Chess Problem Database

Problem Display
PID: 168908 (8/r2pNPq1/n5p1/2P2P2/3knR2/2R2rQ1/2P2p2/BNKb4 w - - 0 1)

Grunfeld, Max

British Chess Magazine, 1928

8/r2pNPq1/n5p1/2P2P2/3knR2/2R2rQ1/2P2p2/BNKb4

#2

11 + 10

14868 Pirnie Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Re3#
    • 1...Rxc3
      • 2.Qxc3#
    • 1...gxf5
      • 2.Qxg7#
    • 1...d5
      • 2.Sc6#
  • Tries
    • 1.Rc4+?
      • 1...Ke3
        • 2.Rcxe4#
        • 2.Rfxe4#
      • 1...Kxc4!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Rxe4#
      • 1...Ke5
        • 2.Re3#
      • 1...Rxc3
        • 2.Qxc3#
      • 1...Rxf4
        • 2.Rc4#
      • 1...Bxc2
        • 2.Sxf3#
      • 1...Sxc5
        • 2.Rd3#
      • 1...gxf5
        • 2.Qxg7#
      • 1...Qe5
        • 2.Sb3#
      • 1...Re3
        • 2.Rc4#
      • 1...d5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINS(e),S_FLIGHT::B(A)+R(E)
    • R(c);OGATE,P_PINP(D),P_SPINR(c),XR(E)::QAB1(F),XR(c)
    • P(g);OGATE,XP(I)::QAB(F),XQ(j)
    • P(i);N_GUARD,SBLOCK::S(J)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(d);P-FLIGHT,XR(E)
  • Actual
    • S(B);
    • Threat
      • R1(G),XS(e)
    • Vars
      • K(d);N_SPINS(e),S_FLIGHT::B(A)+R(E)
      • R(c);OGATE,P_PINP(D),P_SPINR(c),XR(E)::QAB1(F),XR(c)
      • R(c);N_SPINS(e),XR(G)::B(A)+R(E),DCHECK
      • B(a);N_GUARD,XP(D)::S(B),XR(c)
      • S(f);SBLOCK,XP(H)::B(A)+R(E),DCHECK
      • P(g);OGATE,XP(I)::QAB(F),XQ(j)
      • Q(j);SBLOCK::S(B)
      • R(c);::B(A)+R(E),DCHECK
      • P(i);N_GUARD,SBLOCK::S(J)
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