MESON Chess Problem Database

Problem Display
PID: 178587 (8/BK1p4/RN1P4/2kppR2/P7/P1n5/4PP2/6Q1 w - - 0 1)

Buyanov, Aleksandr N

Boletim da UBP, 1981

8/BK1p4/RN1P4/2kppR2/P7/P1n5/4PP2/6Q1

#2

11 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.f3#
    • 1...Kxd6
      • 2.Sc8#
  • Tries
    • 1.Qc1?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxd6
        • 2.Sc8#
      • 1...e4
        • 2.Rxd5#
      • 1...d4!
    • 1.f3+?
      • 1...Kxd6
        • 2.Sc8#
      • 1...d4!
    • 1.f4+?
      • 1...Kxd6
        • 2.Sc8#
      • 1...d4!
  • Keys
    • 1.Rxe5!
      • 1...Kd4
        • 2.f4#
      • 1...Kxd6
        • 2.Sc4#
      • 1...Sxe2
        • 2.Rxd5#
      • 1...Sxa4
        • 2.Rxd5#
      • 1...Sb1
        • 2.Rxd5#
      • 1...Sd1
        • 2.Rxd5#
      • 1...Sa2
        • 2.Rxd5#
      • 1...Se4
        • 2.Rxd5#
      • 1...Sb5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(A)+P(C)
    • K(b);S_FLIGHT,XP(I)::R(G)+S(H),DCHECK
  • Tries
    • Try
      • Q(A);P_PINS(a)
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAB1(A)
        • K(b);N_SPINS(a),S_FLIGHT,XP(I)::R(G)+S(H),DCHECK
        • P(d);OGATE,P_SPINP(c)::R1(F),XP(c)
      • Refutation
        • P(c);P_SPINP(d)
    • Try
      • P(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(I)::R(G)+S(H),DCHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • P(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(I)::R(G)+S(H),DCHECK
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • R(F);P_PINP(c),XP(d)
    • Vars
      • K(b);N_SPINP(c),S_FLIGHT::QAB(A)+P(C)
      • K(b);N_SPINP(c),S_FLIGHT,XP(I)::R(G)+S(H),DCHECK
      • S(a);N_GUARD,XP(B)::R1(F),XP(c)
      • S(a);N_GUARD,XP(E)::R1(F),XP(c)
      • S(a);N_GUARD::R1(F),XP(c)
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