MESON Chess Problem Database

Problem Display
PID: 134826 (3b1B2/1rprn1p1/1pbk1pp1/1pR1R3/3P4/P5K1/3QP3/8 w - - 0 1)

Overkamp, Petrus

L'Italia Scacchistica, 1963

3b1B2/1rprn1p1/1pbk1pp1/1pR1R3/3P4/P5K1/3QP3/8

#2

8 + 12

23 Die Schwalbe 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe3?
      • threat
        • 2.Re6#
      • 1...bxc5
        • 2.dxc5#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Bd5
        • 2.Rexd5#
      • 1...Be4!
    • 1.Qf4?
      • threat
        • 2.Re3#
        • 2.Re4#
        • 2.Rxe7#
      • 1...bxc5
        • 2.dxc5#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Be4
        • 2.Rxe4#
        • 2.Rxe7#
      • 1...g5!
    • 1.Qa2?
      • threat
        • 2.Re6#
        • 2.Qe6#
      • 1...Bd5
        • 2.Qxd5#
      • 1...fxe5!
  • Keys
    • 1.d5!
      • threat
        • 2.dxc6#
      • 1...Kxc5
        • 2.Qb4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...bxc5
        • 2.Re6#
      • 1...fxe5
        • 2.Rxc6#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • R1(G)
      • Vars
        • P(b);OGATE,XR(F)::P(E),XP(b)
        • P(e);OGATE,XR(G)::QAB1(A),XP(e)
        • B(c);N_GUARD::R1(G),XB(c)
      • Refutation
        • B(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);OGATE,XR(F)::P(E),XP(b)
        • P(e);OGATE,P_SPINP(e),XR(G)::QAB1(A),XP(e)
      • Refutation
        • P(f);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);N_GUARD::QAR1(A),XB(c)
      • Refutation
        • P(e);XR(G)
  • Actual
    • P(E);
    • Threat
      • QAR(A)+P(E),XB(c)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
      • K(d);N_SPINS(j),OGATEB,S_FLIGHT,XR(G)::QAB1(A)
      • B(c);OGATE,P_SPINB(c),XP(E)::QAR1(A),XB(c)
      • P(b);SBLOCK,XR(F)::R1(G)
      • P(e);SBLOCK,XR(G)::R1(F),XB(c)
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