MESON Chess Problem Database

Problem Display
PID: 247888 (2BR4/1p1Qp3/p3p3/R2b2P1/3PkP1p/6PK/3PP3/8 w - - 0 1)

Forsberg, Rudolf

2nd Comm., Blikeng-80 JT, 1993-1994

2BR4/1p1Qp3/p3p3/R2b2P1/3PkP1p/6PK/3PP3/8

#2

11 + 7

14867 BCPS Library 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa4#
    • 1...Kf5
      • 2.Qxe6#
    • 1...Ba2
      • 2.Re5#
    • 1...Bb3
      • 2.Re5#
    • 1...Bc4
      • 2.Re5#
    • 1...Bc6
      • 2.Re5#
      • 2.Qxe6#
    • 1...e5
      • 2.Qxd5#
  • Tries
    • 1.Rxd5?
      • threat
        • 2.Re5#
        • 2.Qxe6#
      • 1...exd5
        • 2.Qxd5#
      • 1...e5
        • 2.Rxe5#
        • 2.Qf5#
      • 1...hxg3!
    • 1.Qxe6+?
      • 1...Kxd4
        • 2.Qxd5#
      • 1...Bxe6+!
    • 1.Qd6?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Ra4#
        • 2.Qb4#
      • 1...Kf5
        • 2.Qxe6#
      • 1...e5
        • 2.Qxe5#
        • 2.Qxd5#
      • 1...exd6!
    • 1.Qxb7?
      • 1...Kxd4
        • 2.Qb4#
      • 1...Kf5
        • 2.Qb1#
      • 1...Bxb7
        • 2.Bxb7#
        • 2.Re5#
      • 1...Bc6
        • 2.Re5#
        • 2.Qxc6#
        • 2.Qb1#
      • 1...e5
        • 2.Qxd5#
      • 1...hxg3!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Ra4#
      • 1...Kf5
        • 2.Qc2#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(a);OGATEB,P-FLIGHT,P_SPINB(c),XP(E)::QAR(I)
    • K(a);P_SPINB(c),P_SPINP(e),S_FLIGHT::QAB1(I),XP(e)
    • B(c);OGATE::R1(G)
    • P(e);N_GUARD::QAB1(I),XB(c)
  • Tries
    • Try
      • R(G);XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(e);OGATE,XR(G)::QAB1(I),XP(e)
      • Refutation
        • P(b);XP(C)
    • Try
      • Q(I);CHECK,XP(e)
      • Vars
        • K(a);P-FLIGHT,P_SPINB(c),XP(E)::QAR1(I),XB(c)
      • Refutation
        • B(c);CHECK,XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • K(a);P_SPINB(c),P_SPINP(e),S_FLIGHT::QAB1(I),XP(e)
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);P_PINB(c),XP(f)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR2(I)
        • K(a);P_SPINP(e),S_FLIGHT::QAB(I)
        • P(e);N_GUARD::QAB1(I),XB(c)
      • Refutation
        • P(b);XP(C)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINB(c),XP(E)::R(G)
      • K(a);P_SPINB(c),P_SPINP(e),S_FLIGHT::QAB(I)
      • P(e);::QAR1(I),XP(e)
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