MESON Chess Problem Database

Problem Display
PID: 59716 (1b1n4/3r1p2/n1ppP2p/2Pk3p/PrN4p/3P1K2/6R1/4RQBB w - - 0 1)

Visserman, Eeltje

1st Prize, Friends of Chess, 1971-1972

1b1n4/3r1p2/n1ppP2p/2Pk3p/PrN4p/3P1K2/6R1/4RQBB

#2

11 + 12

3753 FIDE Album (1971-1973) 1978
721 Variantim 2005
6352 A Collection of Chess Problems by Touw Hian Bwee 2008
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4
      • 2.Sb6#
    • 1...Rxc4
      • 2.dxc4#
    • 1...Rb6
      • 2.Sxb6#
  • Tries
    • 1.Rg4?
      • threat
        • 2.Kf4#
      • 1...Rxc4
        • 2.dxc4#
      • 1...Sxc5
        • 2.Rd4#
      • 1...Sxe6
        • 2.Ke2#
      • 1...dxc5
        • 2.Kf2#
      • 1...Rb2!
    • 1.Rg5+?
      • 1...f5
        • 2.Kf4#
        • 2.Rxf5#
      • 1...hxg5!
  • Keys
    • 1.Ke3!
      • threat
        • 2.Qf5#
      • 1...Kxc5
        • 2.Ke4#
      • 1...Kxe6
        • 2.Kd4#
      • 1...dxc5
        • 2.Rg6#
      • 1...fxe6
        • 2.Rg5#
      • 1...f5
        • 2.Qxf5#

This anticipates 272547(1998)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD,XP(H)::S(I)
    • R(a);OGATE,XS(I)::P(F),XR(a)
    • R(a);N_GUARD::S(I),XR(a)
  • Tries
    • Try
      • R(E);
      • Threat
        • B(D)+K(G)
      • Vars
        • R(a);OGATE,XS(I)::P(F),XR(a)
        • S(e);SBLOCK,XP(J)::R1(E)
        • S(l);SBLOCK,XP(K)::B(D)+K(G)
        • P(g);SBLOCK,XP(J)::B(D)+K(G)
      • Refutation
        • R(a);
    • Try
      • R(E);CHECK
      • Refutation
        • P(h);XR(E)
  • Actual
    • K(G);P-FLIGHT
    • Threat
      • QAR2(B)
    • Vars
      • K(c);P-FLIGHT,XP(J)::B(C)+K(G)
      • K(c);S_FLIGHT,XP(K)::R(A)+K(G)
      • P(g);SBLOCK,XP(J)::B(D)+R(E)
      • P(j);SBLOCK,XP(K)::B(D)+R(E),DCHECK
      • P(j);::QAR2(B),XP(j)
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