MESON Chess Problem Database

Problem Display
PID: 235210 (3Kbb1R/p1Q1n1k1/2pPP2R/1p4P1/q2r4/2B5/8/8 w - - 0 1)

Heyl, Peter

Schach, 2002

3Kbb1R/p1Q1n1k1/2pPP2R/1p4P1/q2r4/2B5/8/8

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Bxd4#
    • 1...Qb3
      • 2.Bxd4#
    • 1...Qa2
      • 2.Bxd4#
    • 1...Qa3
      • 2.Bxd4#
    • 1...Qa5
      • 2.Bxd4#
    • 1...Qa6
      • 2.Bxd4#
    • 1...b4
      • 2.Bxd4#
  • Tries
    • 1.Qxe7+?
      • 1...Bf7
        • 2.Qf6#
        • 2.Qxf8#
        • 2.Qxf7#
      • 1...Bxe7+!
  • Keys
    • 1.d7!
      • threat
        • 2.Qe5#
      • 1...Qa5
        • 2.Bxd4#
      • 1...Sd5
        • 2.dxe8S#
      • 1...Sg6
        • 2.R6h7#
      • 1...Sg8
        • 2.R8h7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::B(A),XR(b)
    • Q(a);N_GUARD,P_PINQ(F)::B(A),XR(b)
    • P(c);S_CUTQ(a)::B(A),XR(b)
  • Tries
    • Try
      • Q(F);CHECK,XS(f)
      • Refutation
        • B(i);CHECK,XQ(F)
  • Actual
    • P(C);N_PINS(f)
    • Threat
      • QAB(F)
    • Vars
      • Q(a);N_GUARD,P_PINQ(F)::B(A),XR(b)
      • S(f);N_PINP(C)::PXB(h)=S
      • S(f);SBLOCK::R1(E)
      • S(f);SBLOCK::R1(H)
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