MESON Chess Problem Database

Problem Display
PID: 109611 (1n6/2Pr3Q/2P1k1br/1R1N2B1/2P1NPP1/3p3p/5bn1/7K w - - 0 1)

Verheye, Raymond

Canadian Chess Chat, 1981

1n6/2Pr3Q/2P1k1br/1R1N2B1/2P1NPP1/3p3p/5bn1/7K

#2

11 + 9

6490 yacpdb 2009
3713 Snap 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Qxg6#
    • 1...Rh5
      • 2.Qxg6#
    • 1...Rxd5
      • 2.Qe7#
      • 2.cxd5#
    • 1...Rd6
      • 2.Qe7#
    • 1...Rxc7
      • 2.Sxc7#
    • 1...Re7
      • 2.Qxe7#
    • 1...Rd8
      • 2.Qe7#
      • 2.cxd8S#
    • 1...Bf5
      • 2.Qxf5#
      • 2.gxf5#
    • 1...Bh5
      • 2.Qf5#
    • 1...Bf7
      • 2.Qf5#
    • 1...Be8
      • 2.Qf5#
    • 1...Sxf4
      • 2.Sxf4#
    • 1...Sa6
      • 2.Qxd7#
  • Tries
    • 1.f5+?
      • 1...Bxf5
        • 2.Qxf5#
      • 1...Ke5!
  • Keys
    • 1.Be7!
      • threat
        • 2.Sg5#
      • 1...Rxd5
        • 2.cxd5#
      • 1...Rxe7
        • 2.Qxe7#
      • 1...Bxe4
        • 2.Qg8#
      • 1...Sxf4
        • 2.Sxf4#
      • 1...Rh5
        • 2.Qxg6#
      • 1...Bh4
        • 2.Sc5#

This anticipates 285684(1983)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(g);N_GUARD::QAR2(K),XB(f)
    • R(h);N_GUARD::QAR1(K)
    • R(h);XP(J)::S(G),XR(h)
    • R(h);N_GUARD::QAR1(K),XR(h)
    • B(f);OGATE::QAB1(K)
    • S(b);XP(D)::S(G),XS(b)
    • S(i);N_GUARD::QAB1(K),XR(h)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • B(f);OGATE,XP(D)::QAB1(K),XB(f)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • B(H);
    • Threat
      • S(C)
    • Vars
      • R(h);OGATE,XS(G)::P(B),XR(h)
      • R(h);OGATE,XB(H)::QAR1(K),XR(h)
      • B(f);N_GUARD,XS(C)::QAB(K)
      • S(b);XP(D)::S(G),XS(b)
      • R(g);N_GUARD::QAR2(K),XB(f)
      • B(a);N_GUARD::S(C)
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