MESON Chess Problem Database

Problem Display
PID: 254347 (8/8/1B1p3r/r1pK1Q1p/1p2Np2/RN1k1q1R/b2P2b1/3B4 w - - 0 1)

Umnov, Evgeny Ivanovich

Die Schwalbe, 1930

8/8/1B1p3r/r1pK1Q1p/1p2Np2/RN1k1q1R/b2P2b1/3B4

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Sc1#
      • 2.Sxc5#
    • 1...Bxb3+
      • 2.Rxb3#
    • 1...Bf1
      • 2.Rxf3#
    • 1...c4+
      • 2.Sc5#
  • Keys
    • 1.Kc6!
      • threat
        • 2.Qd5#
      • 1...d5+
        • 2.Sd6#
      • 1...Kc4
        • 2.Qd5#
      • 1...c4
        • 2.Sc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);CHECK,OGATE,P_PINS(F),P_SPINB(a),XS(D)::R(C),XB(a)
    • B(b);N_GUARD::R(E),XQ(d)
    • P(h);CHECK,N_PINS(D),P_PINS(F)::R(C)+S(D),DCHECK
  • Actual
    • K(G);N_SPINS(D),P_SPINS(F),S_FLIGHT
    • Threat
      • QAR2(H)
    • Vars
      • P(j);CHECK,N_PINS(F)::QAB(H)+S(F)
      • K(c);N_SPINQ(d),S_FLIGHT::QAB1(H)
      • P(h);SBLOCK::R(C)+S(D),DCHECK
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