MESON Chess Problem Database

Problem Display
PID: 60391 (8/1K2p2r/1Q2p1p1/4k1NR/3RN1p1/4nrp1/2n2qb1/BB6 w - - 0 1)

Drese, Gerardus Hendrikus

ten Cate, Pieter

The Problemist, 1968

8/1K2p2r/1Q2p1p1/4k1NR/3RN1p1/4nrp1/2n2qb1/BB6

#2

8 + 12

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Sxe6#
    • 1...Rf4
      • 2.Sf3#
      • 2.Sf7#
      • 2.Qxe6#
    • 1...Rf5
      • 2.Qc7#
  • Tries
    • 1.Rd5+?
      • 1...Kxd5
        • 2.Qc5#
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qxe6#
      • 1...Kf4!
    • 1.Qa5+?
      • 1...Kf4
        • 2.Sxe6#
      • 1...Sd5!
    • 1.Qc5+?
      • 1...Kf4
        • 2.Sxe6#
      • 1...Sd5!
    • 1.Qb5+?
      • 1...Kf4
        • 2.Sxe6#
      • 1...Sd5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qxe6#
      • 1...Rf4+
        • 2.Rd5#
      • 1...Rf5+
        • 2.Re4#
      • 1...Rxf6+
        • 2.Sf3#
      • 1...exf6+
        • 2.Sf7#
      • 1...Kf5
        • 2.Qxe6#
      • 1...Kxf6
        • 2.Rf4#
      • 1...Sxa1
        • 2.Sd7#
      • 1...Sxd4
        • 2.Qxd4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(h);S_FLIGHT::S(E),XP(i)
    • R(e);P_PINS(D),SBLOCK::QAB(G)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(h);S_FLIGHT::S(E),XP(i)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(G);CHECK
      • Vars
        • K(h);S_FLIGHT::S(E),XP(i)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(G);CHECK
      • Vars
        • K(h);S_FLIGHT::S(E),XP(i)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • S(D);
    • Threat
      • QAR1(G),XP(i)
    • Vars
      • R(e);CHECK,SBLOCK::B(A)+R(C),DCHECK
      • R(e);CHECK,SBLOCK,XS(D)::R(F)+S(E),DCHECK
      • P(k);CHECK,SBLOCK,XS(D)::R(F)+S(E),DCHECK
      • K(h);P-FLIGHT,P_SPINS(a)::QAB1(G),XP(i)
      • K(h);P_SPINP(i),S_FLIGHT,XS(D)::B(A)+R(C),DCHECK
      • S(a);XB(A)::S(D)
      • S(a);OGATE,P_SPINS(a),XR(C)::QAB1(G),XS(a)
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