MESON Chess Problem Database

Problem Display
PID: 185865 (2b2K2/4QP2/6p1/5kp1/1Nr1nb1P/2r2R1P/1R6/BB6 w - - 0 1)

Onkoud, Abdelaziz

Freie Presse, 2000

(First published on Fri Mar 3 2000)

2b2K2/4QP2/6p1/5kp1/1Nr1nb1P/2r2R1P/1R6/BB6

#2

10 + 8

15391 Problemschach-Jahrbuch (2000) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Bxe4#
    • 1...Rc6
      • 2.Bxe4#
    • 1...Rc7
      • 2.Bxe4#
    • 1...Be6
      • 2.Qxg5#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qf6#
      • 1...Rc2
        • 2.Se3#
      • 1...Rc6
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Rd3!
    • 1.Sc6?
      • threat
        • 2.Qe5#
      • 1...Rxc6
        • 2.Bxe4#
      • 1...Rc5
        • 2.Sd4#
        • 2.Bxe4#
      • 1...Be6
        • 2.Qxg5#
      • 1...Rxf3!
    • 1.Qxe4+?
      • 1...Kf6
        • 2.Sd5#
        • 2.Qe7#
      • 1...Rxe4!
  • Keys
    • 1.Rg2!
      • threat
        • 2.Rxg5#
      • 1...Rxf3
        • 2.Qf6#
      • 1...gxh4
        • 2.Rg5#
      • 1...Rc2
        • 2.Qe5#
      • 1...Rd3
        • 2.Qe5#
      • 1...g4
        • 2.hxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::B(B),XS(c)
    • B(h);SBLOCK::QAR1(H),XP(f)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(H)
      • Vars
        • R(a);N_GUARD,N_SPINS(c)::S(F)
      • Refutation
        • R(a);N_SPINS(c)
    • Try
      • S(F);
      • Threat
        • QAR1(H)
      • Vars
        • R(b);N_GUARD,XS(F)::B(B),XS(c)
        • B(h);SBLOCK::QAR1(H),XP(f)
      • Refutation
        • R(a);N_SPINB(d),XR(D)
    • Try
      • Q(H);CHECK,XS(c)
      • Refutation
        • R(b);P_SPINR(b),XQ(H)
  • Actual
    • R(C);
    • Threat
      • R1(C),XP(f)
    • Vars
      • R(a);N_SPINB(d),XR(D)::QAR1(H)
      • P(f);XP(G)::R1(C)
      • R(a);N_SPINS(c)::QAR1(H)
      • P(f);OGATE::P(E),XP(f)
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