MESON Chess Problem Database

Problem Display
PID: 86215 (8/3R1K2/1r1p4/6Qp/R1N1k1p1/2pqrp2/b1B2B2/8 w - - 0 1)

Baev, Georgy S

Loshinski, Lev Ilich

La Liberte, 1929

8/3R1K2/1r1p4/6Qp/R1N1k1p1/2pqrp2/b1B2B2/8

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe5#
    • 1...Re1
      • 2.Re7#
    • 1...Re2
      • 2.Re7#
    • 1...Rb3
      • 2.Sd2#
      • 2.Sxd6#
    • 1...Bb1
      • 2.Sd2#
      • 2.Sxb6#
      • 2.Sxd6#
    • 1...Bxc4+
      • 2.Rxc4#
    • 1...d5
      • 2.Sd2#
      • 2.Sd6#
      • 2.Qe5#
  • Tries
    • 1.Qxe3+?
      • 1...Kf5
        • 2.Bxd3#
      • 1...Kd5!
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Kxf5!
  • Keys
    • 1.Ke6!
      • threat
        • 2.Qxe3#
      • 1...Kd4+
        • 2.Qe5#
      • 1...Bxc4+
        • 2.Rxc4#
      • 1...d5+
        • 2.Sd6#
      • 1...Re1
        • 2.Qf5#
      • 1...Re2
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);N_SPINQ(c),P-FLIGHT,P_SPINP(j),P_SPINR(d)::QAB1(E)
    • R(d);::R(F)
    • B(a);CHECK,OGATE,P_SPINB(a),XS(D)::R(C),XB(a)
  • Tries
    • Try
      • Q(E);CHECK,XR(d)
      • Vars
        • K(f);S_FLIGHT::B(A),XQ(c)
      • Refutation
        • K(f);N_PINS(D),N_SPINQ(c),P_SPINP(j),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);N_SPINQ(c),P-FLIGHT,P_SPINP(j),P_SPINR(d)::QAB1(E)
      • Refutation
        • K(f);S_FLIGHT,XQ(E)
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • QAR1(E),XR(d)
    • Vars
      • K(f);CHECK,N_SPINQ(c),P-FLIGHT,P_SPINP(j),P_SPINR(d)::QAB1(E)
      • B(a);CHECK,OGATE,P_SPINB(a),XS(D)::R(C),XB(a)
      • P(j);CHECK,N_PINS(D)::R(C)+S(D),DCHECK
      • R(d);::QAB1(E)
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