MESON Chess Problem Database

Problem Display
PID: 7219 (2N5/qPN5/p1P1R3/3p2p1/PRpk1pK1/1P1p4/2pB1pBQ/2r5 w - - 0 1)

Backe, Espen

1st Prize, The Problemist, 1998

2N5/qPN5/p1P1R3/3p2p1/PRpk1pK1/1P1p4/2pB1pBQ/2r5

#2

12 + 11

23 Die Schwalbe 2007
6166 FIDE Album (1998-2000) 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qh8#
    • 1...f1B
      • 2.Qg1#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Rxc4#
      • 1...Kc5
        • 2.Rxc4#
      • 1...Qc5
        • 2.Bc3#
        • 2.Qh8#
      • 1...f3!
    • 1.Bxd5?
      • threat
        • 2.Rxc4#
        • 2.Qxf2#
      • 1...Kc5
        • 2.Rxc4#
        • 2.Qxf2#
      • 1...f1Q
        • 2.Rxc4#
      • 1...f1S
        • 2.Rxc4#
      • 1...f1B
        • 2.Rxc4#
        • 2.Qg1#
        • 2.Qf2#
      • 1...f1R
        • 2.Rxc4#
      • 1...Qc5
        • 2.Re4#
        • 2.Qxf2#
        • 2.Qh8#
      • 1...Re1
        • 2.Rxc4#
      • 1...Rf1
        • 2.Rxc4#
      • 1...Rg1+!
    • 1.Re5?
      • threat
        • 2.Rxd5#
      • 1...Kc5
        • 2.Rxc4#
      • 1...Kxe5
        • 2.Qh8#
      • 1...f3
        • 2.Se6#
      • 1...Qc5!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Rxd5#
      • 1...Kc5
        • 2.Se6#
      • 1...Ke5
        • 2.Qh8#
      • 1...Qc5
        • 2.Qh8#
      • 1...f3
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(k);SBLOCK::QAB(C)
    • P(c);OGATEB::QAB(C)
  • Tries
    • Try
      • S(K);XP(h)
      • Threat
        • R1(F),XP(e)
      • Vars
        • K(f);N_SPINP(e),S_FLIGHT::R1(F),XP(e)
      • Refutation
        • P(g);
    • Try
      • B(B);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::R1(F),XP(e)
        • R(a);::R1(F),XP(e)
      • Refutation
        • R(a);CHECK
    • Try
      • R(I);
      • Threat
        • R1(I),XP(h)
      • Vars
        • K(f);N_SPINP(e),P_SPINP(h),S_FLIGHT::R1(F),XP(e)
        • K(f);N_SPINP(e),OGATEB,P_SPINP(g),S_FLIGHT,XR(I)::QAB(C)
        • P(g);::S(K)
      • Refutation
        • Q(k);
  • Actual
    • R(I);
    • Threat
      • R1(I),XP(h)
    • Vars
      • K(f);N_SPINP(e),S_FLIGHT::S(K)
      • K(f);N_SPINP(e),P_SPINP(g),S_FLIGHT::QAB(C)
      • Q(k);SBLOCK::QAB(C)
      • P(g);::R1(F),XP(e)
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