MESON Chess Problem Database

Problem Display
PID: 115161 (4B3/3p4/2P1PQ2/P1k2P1R/4P1N1/1K4R1/5N1B/8 w - - 0 1)

Bettmann, Henry Wald

La Presse, 1915

4B3/3p4/2P1PQ2/P1k2P1R/4P1N1/1K4R1/5N1B/8

#2

13 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Rc3#
    • 1...dxc6
      • 2.Qe5#
    • 1...dxe6
      • 2.Qe5#
  • Tries
    • 1.Ka4?
      • threat
        • 2.Rc3#
      • 1...Kc4
        • 2.Rc3#
        • 2.Qc3#
      • 1...Kd6
        • 2.Rc3#
      • 1...Kxc6!
    • 1.Bxd7?
      • threat
        • 2.Qe5#
      • 1...Kd6
        • 2.Rc3#
      • 1...Kb5!
    • 1.Qd4+?
      • 1...Kb5
        • 2.Qb6#
      • 1...Kxc6
        • 2.Qb6#
      • 1...Kxd4!
    • 1.Qe5+?
      • 1...d5
        • 2.Qxd5#
      • 1...Kxc6!
  • Keys
    • 1.Qd8!
      • 1...Kd4
        • 2.Qb6#
      • 1...Kb5
        • 2.Qb6#
      • 1...Kxc6
        • 2.Qb6#
      • 1...Kd6
        • 2.Rc3#
      • 1...dxc6
        • 2.f6#
      • 1...dxe6
        • 2.fxe6#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(B)+R(D)
    • P(b);N_GUARD,XP(J)::QAR2(L)
    • P(b);N_GUARD,XP(K)::QAR2(L)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • R(D)
      • Vars
        • K(a);S_FLIGHT::B(B)+R(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XP(J)
    • Try
      • B(M);XP(b)
      • Threat
        • QAR2(L)
      • Vars
        • K(a);S_FLIGHT::B(B)+R(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(L);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(L)
        • K(a);OGATE,P-FLIGHT,P_SPINP(b),XP(J)::QAR1(L)
      • Refutation
        • K(a);S_FLIGHT,XQ(L)
    • Try
      • Q(L);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR1(L),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XP(J)
  • Actual
    • Q(L);
    • Vars
      • K(a);P_SPINP(b),S_FLIGHT::QAB(L)
      • K(a);P-FLIGHT::QAR1(L)
      • K(a);P-FLIGHT,P_SPINP(b),XP(J)::QAR1(L)
      • K(a);P_SPINP(b),S_FLIGHT::B(B)+R(D)
      • P(b);N_GUARD,XP(J)::R(I)+P(H)
      • P(b);OGATE,XP(K)::R(I)+P(H),XP(b)
      • P(b);OGATE::QAR1(L),XP(b)
      • P(b);SBLOCK::QAB1(L)
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