MESON Chess Problem Database

Problem Display
PID: 262377 (8/7B/1K3p2/Q2pPr2/2Pk4/4N1P1/1bb1PP2/2R1n1B1 w - - 0 1)

Goldschmeding, Cornelis

Europe Echecs, 1961

8/7B/1K3p2/Q2pPr2/2Pk4/4N1P1/1bb1PP2/2R1n1B1

#2

11 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxd5#
    • 1...Kxe5
      • 2.Qxd5#
    • 1...Bc3
      • 2.Qxd5#
    • 1...Bb1
      • 2.Qxd5#
    • 1...Bd1
      • 2.Qxd5#
    • 1...Bb3
      • 2.Qxd5#
    • 1...Bd3
      • 2.Qxd5#
    • 1...Ba4
      • 2.Qxd5#
  • Tries
    • 1.Sxc2+?
      • 1...Kxc4
        • 2.Qb4#
      • 1...Ke4
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qxd5#
      • 1...Sxc2!
    • 1.Sxf5+?
      • 1...Ke4
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qxd5#
      • 1...Bxf5
        • 2.Qxd5#
      • 1...Kxc4!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qxd5#
      • 1...Kc3!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Qa4#
      • 1...Ke4
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qxd5#
      • 1...Rxe5
        • 2.Qc5#
      • 1...dxc4
        • 2.f3#
      • 1...Be4
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(d);N_GUARD,P-FLIGHT,P_SPINR(f)::QAB1(H),XP(e)
    • K(d);N_GUARD,P_SPINP(e),S_FLIGHT,XP(I)::QAR1(H),XP(e)
    • B(b);SBLOCK::QAR1(H),XP(e)
    • B(c);::QAR1(H),XP(e)
  • Tries
    • Try
      • S(E);CHECK,XB(c)
      • Vars
        • K(d);N_GUARD,P-FLIGHT,S_CUTS(a),XP(G)::QAR1(H)
        • K(d);N_GUARD,P-FLIGHT,P_SPINR(f)::QAB1(H),XP(e)
        • K(d);N_GUARD,P_SPINP(e),S_FLIGHT,XP(I)::QAR1(H),XP(e)
      • Refutation
        • S(a);XS(E)
    • Try
      • S(E);CHECK,XR(f)
      • Vars
        • K(d);N_GUARD,P-FLIGHT::QAB1(H),XP(e)
        • K(d);N_GUARD,P_SPINP(e),S_FLIGHT,XP(I)::QAR1(H),XP(e)
        • B(c);XS(E)::QAR1(H),XP(e)
      • Refutation
        • K(d);P-FLIGHT,P_SPINB(c),XP(G)
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT,P_SPINR(f)::QAB1(H),XP(e)
        • K(d);N_GUARD,P_SPINP(e),S_FLIGHT,XP(I)::QAR1(H),XP(e)
      • Refutation
        • K(d);P_SPINB(c),S_FLIGHT
  • Actual
    • S(E);
    • Threat
      • QAR1(H),XP(e)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINB(c),XP(G)::QAR2(H)
      • K(d);P-FLIGHT,P_SPINR(f)::QAB1(H),XP(e)
      • K(d);P_SPINP(e),S_FLIGHT,XP(I)::QAR1(H),XP(e)
      • R(f);SBLOCK,XP(I)::QAB1(H)
      • P(e);SBLOCK,XP(G)::B(B)+P(D)
      • B(c);SBLOCK::B(B)+P(D)
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