MESON Chess Problem Database

Problem Display
PID: 100996 (5n2/2NP1r2/Q1B2p1p/2p1k2K/3R1R2/1P2pP2/2pr1n2/8 w - - 0 1)

Heftman, Hyman

Good Companions, 1921

5n2/2NP1r2/Q1B2p1p/2p1k2K/3R1R2/1P2pP2/2pr1n2/8

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qb5#
      • 2.Qa5#
  • Tries
    • 1.Rde4+?
      • 1...Kd6
        • 2.Sb5#
        • 2.Se8#
      • 1...Sxe4!
    • 1.Rf5+?
      • 1...Kxd4
        • 2.Qc4#
      • 1...Kxf5!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qd6#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kxf4
        • 2.Qd6#
      • 1...Rxd4
        • 2.Rf5#
      • 1...Rxd7
        • 2.Qxf6#
      • 1...Sxe4
        • 2.Rdxe4#
      • 1...cxd4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • S(c);XR(C)
    • Try
      • R(D);CHECK
      • Vars
        • K(f);S_FLIGHT,XR(C)::QAR1(F)
      • Refutation
        • K(f);P-FLIGHT,XR(D)
  • Actual
    • B(G);
    • Threat
      • QAB1(F)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XR(C)::QAB(F)
      • K(f);S_FLIGHT,XR(D)::QAB(F)
      • R(b);SBLOCK,XR(C)::R1(D)
      • R(i);N_GUARD,XP(I)::QAB1(F),XP(g)
      • S(c);OGATE,XB(G)::R1(C),XS(c)
      • P(e);SBLOCK,XR(C)::R1(D)
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