MESON Chess Problem Database

Problem Display
PID: 276484 (4B3/8/3Q2N1/6p1/R3b1k1/6N1/8/6K1 w - - 0 1)

Popa, Nicolae

Phenix, 2003

4B3/8/3Q2N1/6p1/R3b1k1/6N1/8/6K1

#2

6 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Sf1?
      • 1...Kf3
        • 2.Qd1#
      • 1...Kh3
        • 2.Qg3#
      • 1...Kf5
        • 2.Se3#
        • 2.Bd7#
      • 1...Kh5!
    • 1.Rxe4+?
      • 1...Kf3
        • 2.Qa3#
        • 2.Qd3#
      • 1...Kh3!
  • Keys
    • 1.Sf5!
      • 1...Kf3
        • 2.Qd1#
      • 1...Kh3
        • 2.Qg3#
      • 1...Kxf5
        • 2.Bd7#
      • 1...Kh5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(b);N_GUARD,N_SPINB(a),S_FLIGHT::QAB(D)
        • K(b);N_GUARD,N_SPINB(a),S_FLIGHT::QAR1(D)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • R(C);CHECK,XB(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(b);N_GUARD,N_SPINB(a),S_FLIGHT::QAB(D)
      • K(b);N_GUARD,N_SPINB(a),S_FLIGHT::QAR1(D)
      • K(b);N_SPINB(a),OGATEB,S_FLIGHT,XS(B)::B(F)
      • K(b);N_GUARD,N_SPINB(a),S_FLIGHT::B(F)+S(E)
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