MESON Chess Problem Database

Problem Display
PID: 70846 (8/3R4/8/7B/2p5/P1P2nN1/1K1Pb2q/RN1kBQ2 w - - 0 1)

Leites, Samuil Davidovich

Loshinski, Lev Ilich

Umnov, Evgeny Ivanovich

Bristol Times, 1931

8/3R4/8/7B/2p5/P1P2nN1/1K1Pb2q/RN1kBQ2

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Qxe2#
    • 1...Qh1
      • 2.Qxe2#
    • 1...Qh3
      • 2.Qxe2#
    • 1...Qh4
      • 2.Qxe2#
    • 1...Qxh5
      • 2.Qxe2#
    • 1...Sg1
      • 2.Bf2#
    • 1...Sxd2
      • 2.Sxd2#
      • 2.Bxd2#
      • 2.Bf2#
      • 2.Rxd2#
    • 1...Sd4
      • 2.Bf2#
    • 1...Sh4
      • 2.Bf2#
    • 1...Se5
      • 2.Bf2#
    • 1...Sg5
      • 2.Bf2#
  • Tries
    • 1.Bf2+?
      • 1...Se1
        • 2.Bxe2#
        • 2.Qxe2#
        • 2.Qxe1#
      • 1...Bxf1!
    • 1.Bxf3?
      • threat
        • 2.Bf2#
      • 1...Qg1
        • 2.Bxe2#
        • 2.Qxe2#
      • 1...Qh1
        • 2.Bxe2#
        • 2.Qxe2#
      • 1...Qf2
        • 2.Bxf2#
      • 1...Qh3
        • 2.Bxe2#
        • 2.Qxe2#
      • 1...Qg2!
  • Keys
    • 1.d3!
      • threat
        • 2.Sd2#
      • 1...Bxd3+
        • 2.Bf2#
      • 1...Sxe1
        • 2.dxc4#
      • 1...Sd2
        • 2.Sxd2#
        • 2.Bxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD::QAB1(D),XB(b)
    • Q(c);N_GUARD,XB(J)::QAB1(D),XB(b)
    • S(d);N_GUARD,P_SPINB(b)::QAR(D)+B(C)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • B(b);P_SPINS(d),XQ(D)
    • Try
      • B(J);P_PINB(b),XS(d)
      • Threat
        • QAR(D)+B(C)
      • Vars
        • Q(c);::QAR(D)+B(C),XQ(c)
      • Refutation
        • Q(c);
  • Actual
    • P(F);
    • Threat
      • R(A)+S(B)
    • Vars
      • B(b);CHECK,N_GUARD,P_SPINB(b),P_SPINS(d),XP(F)::QAR(D)+B(C)
      • S(d);N_GUARD,P_SPINB(b),P_SPINS(d),XB(C)::R(K)+P(F),XP(e)
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