MESON Chess Problem Database

Problem Display
PID: 200285 (2Qn1r1b/3R1p2/2pR4/r3k2K/p6B/2P1ppP1/8/1B6 w - - 0 1)

Blikeng, Bjarne

Probleemblad, 1980

2Qn1r1b/3R1p2/2pR4/r3k2K/p6B/2P1ppP1/8/1B6

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Bxf6#
  • Tries
    • 1.Rxd8?
      • threat
        • 2.Qf5#
      • 1...f5
        • 2.Re6#
        • 2.Qe6#
      • 1...Rxd8!
    • 1.Qxd8?
      • threat
        • 2.Re7#
        • 2.Qe7#
      • 1...Ra7
        • 2.Qe7#
      • 1...Re8
        • 2.Qxe8#
      • 1...Bf6
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Rxd8!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Rxe3#
      • 1...Ke4+
        • 2.R3d5#
      • 1...Ke6+
        • 2.R7d5#
      • 1...Kf5
        • 2.Rxe3#
      • 1...e2
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(j);N_GUARD::B(D),XB(j)
  • Tries
    • Try
      • R(G);XS(h)
      • Threat
        • QAR1(H)
      • Refutation
        • R(i);XR(G)
    • Try
      • Q(H);XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::QAR2(H)
        • R(i);N_GUARD::QAR(H),XR(i)
      • Refutation
        • R(i);XQ(H)
  • Actual
    • R(F);
    • Threat
      • R(F),XP(a)
    • Vars
      • K(e);CHECK,P-FLIGHT::B(A)+R(F)
      • K(e);CHECK,P-FLIGHT::QAB(H)+R(G)
      • K(e);P-FLIGHT::B(A)+R(F),XP(a)
      • P(a);::R(F)
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