MESON Chess Problem Database

Problem Display
PID: 185924 (3K4/2p5/2p2pB1/Rn3p2/2N1kp2/3N4/2Q1P3/r2qR1B1 w - - 0 1)

Stoyanov, Kiril N

Chess, 1957

3K4/2p5/2p2pB1/Rn3p2/2N1kp2/3N4/2Q1P3/r2qR1B1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sxf4#
    • 1...Qxe1
      • 2.Sb4#
    • 1...Qxd3+
      • 2.Qxd3#
    • 1...Sa3
      • 2.Bxf5#
    • 1...Sc3
      • 2.Bxf5#
    • 1...Sd4
      • 2.Sf2#
    • 1...Sa7
      • 2.Bxf5#
  • Tries
    • 1.Sd2+?
      • 1...Qxd2
        • 2.Qxc6#
      • 1...Kd5!
    • 1.Bxf5+?
      • 1...Kd5
        • 2.Sb4#
        • 2.Sxf4#
      • 1...Kxf5!
  • Keys
    • 1.Bh5!
      • threat
        • 2.Bf3#
      • 1...Qxd3+
        • 2.Qxd3#
      • 1...Kd5
        • 2.Sxf4#
      • 1...Qxe2
        • 2.Sb4#
      • 1...Sd4
        • 2.Sf2#
      • 1...f3
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(c);N_PINS(E),N_SPINP(f),P_SPINS(e),S_FLIGHT::S(E),XP(d)
    • Q(b);N_PINS(E),XR(A)::QAB(C)+S(E)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAB1(C),XQ(b)
    • S(e);::B(H),XP(f)
    • S(e);N_PINS(E),SBLOCK::QAB(C)+S(E),DCHECK
  • Tries
    • Try
      • S(F);CHECK,N_SPINS(E)
      • Vars
        • Q(b);P_PINS(E),XS(F)::QAB(C),XP(g)
      • Refutation
        • K(c);N_SPINP(f),P_SPINS(e),S_FLIGHT
    • Try
      • B(H);CHECK,XP(f)
      • Refutation
        • K(c);P_SPINS(e),S_FLIGHT,XB(H)
  • Actual
    • B(H);N_PINP(f)
    • Threat
      • B(H)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAB1(C),XQ(b)
      • K(c);N_PINS(E),P_SPINS(e),S_FLIGHT::S(E),XP(d)
      • Q(b);N_PINS(E),P_SPINQ(b),XP(D)::QAB(C)+S(E)
      • S(e);N_PINS(E),SBLOCK::QAB(C)+S(E),DCHECK
      • P(d);::B(H),XP(d)
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