MESON Chess Problem Database

Problem Display
PID: 7275 (K2R4/2p4N/p1Q4p/4Bp1k/1R6/5q1P/4B3/3b4 w - - 0 1)

Avner, Uri

1st Comm., Netanya (Internet), 1999

K2R4/2p4N/p1Q4p/4Bp1k/1R6/5q1P/4B3/3b4

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Qe8#
    • 1...Bc2
      • 2.Bxf3#
    • 1...Bb3
      • 2.Bxf3#
    • 1...Ba4
      • 2.Bxf3#
  • Tries
    • 1.Sf6+?
      • 1...Kg5
        • 2.Rg8#
      • 1...Kg6!
    • 1.Rd6?
      • threat
        • 2.Rxh6#
        • 2.Qxf3#
      • 1...Qxe2
        • 2.Rxh6#
        • 2.Qe8#
      • 1...Bxe2
        • 2.Rxh6#
      • 1...Qg4
        • 2.Rxh6#
      • 1...f4
        • 2.Rxh6#
      • 1...cxd6!
  • Keys
    • 1.Bg3!
      • threat
        • 2.Rh4#
      • 1...Qg4
        • 2.Qe8#
      • 1...f4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_PINQ(E),N_SPINQ(b),XB(A)::QAB(E)
    • B(a);N_GUARD::B(A),XQ(b)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);N_SPINQ(b),P-FLIGHT::R(H)
      • Refutation
        • K(d);N_SPINQ(b),S_FLIGHT
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_SPINQ(b),XB(A)::R1(H),XP(f)
        • Q(b);N_PINQ(E)::R1(H),XP(f)
        • P(c);::R1(H),XP(f)
      • Refutation
        • P(g);XR(H)
  • Actual
    • B(D);
    • Threat
      • R1(C)
    • Vars
      • Q(b);N_PINQ(E)::QAB(E)
      • P(c);OGATEB::R(H)
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