MESON Chess Problem Database

Problem Display
PID: 235648 (n4Q2/3p4/1p1rNp2/1p1k1p2/1K1N1P2/2pB1P2/3R4/8 w - - 0 1)

Groeneveld, Cornelis

Pat a Mat, 1987

n4Q2/3p4/1p1rNp2/1p1k1p2/1K1N1P2/2pB1P2/3R4/8

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sxb5?
      • threat
        • 2.Qxd6#
      • 1...Kc6
        • 2.Qxa8#
      • 1...Rxe6
        • 2.Be4#
      • 1...Rc6
        • 2.Bc4#
      • 1...Kxe6!
    • 1.Qxf6?
      • threat
        • 2.Qe5#
        • 2.Qxf5#
      • 1...dxe6
        • 2.Qe5#
      • 1...Rc6
        • 2.Qe5#
      • 1...Rxe6!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Qxd6#
      • 1...Kc6
        • 2.Qxa8#
      • 1...Kxe6
        • 2.Qg8#
      • 1...Rxe6
        • 2.Be4#
      • 1...Rc6
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);XP(b)
      • Threat
        • QAR1(H),XR(f)
      • Vars
        • K(c);S_FLIGHT::QAB(H),XS(i)
        • R(f);SBLOCK,XS(G)::R(A)+B(B),DCHECK
        • R(f);SBLOCK::R(A)+B(B),DCHECK
      • Refutation
        • K(c);S_FLIGHT,XS(G)
    • Try
      • Q(H);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);XS(G)::QAR1(H)
        • R(f);::QAR1(H)
      • Refutation
        • R(f);XS(G)
  • Actual
    • S(E);XP(d)
    • Threat
      • QAR1(H),XR(f)
    • Vars
      • K(c);S_FLIGHT::QAB(H),XS(i)
      • K(c);OGATEB,S_FLIGHT,XS(G)::QAB(H)
      • R(f);SBLOCK,XS(G)::R(A)+B(B),DCHECK
      • R(f);SBLOCK::R(A)+B(B),DCHECK
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