MESON Chess Problem Database

Problem Display
PID: 259209 (2b5/7B/n2R3B/5n1R/3pk2p/Q7/8/1N5K w - - 0 1)

Bylevski, Aleksandr

Skakbladet, 1982

2b5/7B/n2R3B/5n1R/3pk2p/Q7/8/1N5K

#2

7 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Rxf5?
      • threat
        • 2.Sd2#
        • 2.Qf3#
      • 1...d3
        • 2.Sd2#
        • 2.Sc3#
        • 2.Qxd3#
      • 1...Bxf5!
    • 1.Rxd4+?
      • 1...Ke5
        • 2.Qd6#
      • 1...Kxd4!
    • 1.Qa2?
      • threat
        • 2.Qe2#
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke5
        • 2.Qd5#
      • 1...d3
        • 2.Qd5#
      • 1...Kd3!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qxd4#
      • 1...Kxd3!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Bf4#
        • 2.Qd5#
        • 2.Qf4#
      • 1...Kxf3!
    • 1.Qg3?
      • threat
        • 2.Sd2#
        • 2.Rxh4#
      • 1...h3
        • 2.Sd2#
        • 2.Rh4#
      • 1...hxg3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qe2#
      • 1...Kd3
        • 2.Rxd4#
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke5
        • 2.Qxd4#
      • 1...d3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);XS(d)
      • Threat
        • DUALS(2)
      • Refutation
        • B(f);P_SPINB(f),XR(D)
    • Try
      • R(E);CHECK,XP(a)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);N_SPINS(d),P-FLIGHT,XR(E)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • K(b);N_GUARD,N_SPINS(d),S_FLIGHT::QAB1(C)
        • K(b);N_GUARD,P-FLIGHT::QAR1(C)
        • P(a);::QAB1(C)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAB1(C),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);N_SPINS(d),S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • K(b);N_GUARD,P_SPINP(a),S_FLIGHT::R1(E),XP(a)
      • K(b);N_GUARD,N_SPINS(d),S_FLIGHT::QAB1(C)
      • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::QAB1(C),XP(a)
      • P(a);::S(A)
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