MESON Chess Problem Database

Problem Display
PID: 159607 (7B/8/2p4R/2pN3Q/P1kpp3/Pp2P3/2P2K2/1BR5 w - - 0 1)

Anonymous

BCPJ (May), 1919

7B/8/2p4R/2pN3Q/P1kpp3/Pp2P3/2P2K2/1BR5

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Ba2#
    • 1...dxe3+
      • 2.Sxe3#
    • 1...d3
      • 2.Sb6#
      • 2.cxd3#
  • Tries
    • 1.Ke2?
      • 1...d3+
        • 2.cxd3#
      • 1...bxc2
        • 2.Ba2#
      • 1...dxe3
        • 2.Sxe3#
        • 2.Sb6#
      • 1...b2
        • 2.Ba2#
      • 1...cxd5!
    • 1.Bxd4?
      • threat
        • 2.Sb6#
      • 1...cxd4
        • 2.Rxc6#
      • 1...cxd5
        • 2.Qe2#
      • 1...bxc2!
    • 1.Rd1?
      • 1...dxe3+
        • 2.Sxe3#
      • 1...bxc2
        • 2.Ba2#
      • 1...b2
        • 2.Ba2#
      • 1...d3
        • 2.Sb6#
      • 1...cxd5!
    • 1.Rxc6?
      • 1...dxe3+
        • 2.Sxe3#
      • 1...b2
        • 2.Ba2#
      • 1...d3
        • 2.Sb6#
        • 2.cxd3#
      • 1...bxc2!
    • 1.Qe2+?
      • 1...d3
        • 2.Sb6#
      • 1...Kxd5!
    • 1.c3?
      • threat
        • 2.Sb6#
        • 2.cxd4#
      • 1...dxe3+
        • 2.Sxe3#
      • 1...dxc3
        • 2.Sb6#
        • 2.Rxc3#
      • 1...cxd5
        • 2.cxd4#
      • 1...d3
        • 2.Sb6#
      • 1...b2!
  • Keys
    • 1.Qd1!
      • 1...dxe3+
        • 2.Sxe3#
      • 1...Kxd5
        • 2.c4#
      • 1...bxc2
        • 2.Ba2#
      • 1...cxd5
        • 2.cxb3#
      • 1...b2
        • 2.Ba2#
      • 1...d3
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::B(A)
    • P(c);CHECK,XP(F)::S(H),XP(c)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(c);CHECK,OGATE::R(B)+P(C)DCHECK,XP(c)
        • P(a);OGATEB,P_SPINP(a),XP(C)::B(A)
        • P(a);OGATEB::B(A)
      • Refutation
        • P(f);XS(H)
    • Try
      • B(K);XP(c)
      • Threat
        • S(H)
      • Vars
        • P(e);OGATEB,XB(K)::R(J),XP(f)
        • P(f);SBLOCK,XS(H)::QAB(I)
      • Refutation
        • P(a);P_SPINP(a),XP(C)
    • Try
      • R(B);
      • Vars
        • P(c);CHECK,XP(F)::S(H),XP(c)
        • P(a);OGATEB,XP(C)::B(A)
        • P(a);OGATEB::B(A)
        • P(c);::S(H)
      • Refutation
        • P(f);XS(H)
    • Try
      • R(J);P_PINP(e),XP(f)
      • Vars
        • P(c);CHECK,XP(F)::S(H),XP(c)
        • P(a);OGATEB::B(A)
      • Refutation
        • P(a);N_SPINP(e),P_SPINP(a),XP(C)
    • Try
      • Q(I);CHECK
      • Vars
        • P(c);P_SPINP(c)::S(H)
      • Refutation
        • K(b);S_FLIGHT,XS(H)
    • Try
      • P(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);CHECK,XP(F)::S(H),XP(c)
        • P(f);XS(H)::R(B)+P(C),XP(c)
        • P(c);::S(H)
      • Refutation
        • P(a);
  • Actual
    • Q(I);
    • Vars
      • P(c);CHECK,XP(F)::S(H),XP(c)
      • K(b);OGATE,P_SPINP(c),S_FLIGHT,XS(H)::P(C)
      • P(a);OGATEB,P_SPINP(a),XP(C)::B(A)
      • P(f);SBLOCK,XS(H)::R(B)+P(C)DCHECK,XP(a)
      • P(a);OGATEB::B(A)
      • P(c);::S(H)
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