MESON Chess Problem Database

Problem Display
PID: 274232 (2b2r2/2pQ2Np/8/qn1P1R2/3Bk3/R5nK/2Pr2N1/2bB4 w - - 0 1)

Eerkes, Allard Pieter

Probleemblad, 1953

2b2r2/2pQ2Np/8/qn1P1R2/3Bk3/R5nK/2Pr2N1/2bB4

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Bf3#
    • 1...Rd8
      • 2.Rf4#
    • 1...Re8
      • 2.Rf4#
    • 1...Rg8
      • 2.Rf4#
    • 1...Rh8
      • 2.Rf4#
    • 1...Sxd4
      • 2.Re3#
  • Tries
    • 1.Qe7+?
      • 1...Be6
        • 2.Qh4#
      • 1...Kxd4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Re5#
      • 1...Kxf5
        • 2.Qxh7#
      • 1...Rxd4
        • 2.Sc5#
      • 1...Rxf5
        • 2.Re3#
      • 1...Sxf5
        • 2.Bf3#
      • 1...Sxd4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(b);SBLOCK,XB(F)::B(A)
    • R(j);N_GUARD::R1(H)
    • S(f);SBLOCK,XB(F)::R1(D)
  • Tries
    • Try
      • Q(I);CHECK,P_SPINR(H)
      • Vars
        • B(i);P_SPINB(i)::QAR(I)
      • Refutation
        • K(d);P-FLIGHT,XB(F)
  • Actual
    • S(J);
    • Threat
      • R1(H)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(H)::QAB(I),XP(h)
      • R(b);SBLOCK,XB(F)::S(J)
      • R(j);SBLOCK,XR(H)::R1(D)
      • S(c);SBLOCK,XR(H)::B(A)
      • S(f);SBLOCK,XB(F)::S(J)
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