MESON Chess Problem Database

Problem Display
PID: 1144 (1Q2K3/8/8/3k3B/N2N2P1/2n5/1B2P3/2R5 w - - 0 1)

McWilliam, Robert C

Problem Observer, 1986

1Q2K3/8/8/3k3B/N2N2P1/2n5/1B2P3/2R5

#2

9 + 2

832 Sahovski Glasnik 1989
3713 Snap 2007
15393 McWilliam Scrapbook 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Sb6#
      • 2.Bf7#
  • Tries
    • 1.Sf3?
      • 1...Kc4
        • 2.Bf7#
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Sxe2
        • 2.Qe5#
      • 1...Sxa4
        • 2.Qe5#
      • 1...Sb1
        • 2.Qe5#
      • 1...Sd1
        • 2.Qe5#
      • 1...Sa2
        • 2.Qe5#
      • 1...Se4
        • 2.Bf7#
        • 2.Qe5#
      • 1...Sb5
        • 2.Qe5#
      • 1...Kc6!
    • 1.Sc6?
      • 1...Kc4
        • 2.Bf7#
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Sxe2
        • 2.Qe5#
      • 1...Sxa4
        • 2.Qe5#
      • 1...Sb1
        • 2.Qe5#
      • 1...Sd1
        • 2.Qe5#
      • 1...Sa2
        • 2.Qe5#
      • 1...Se4
        • 2.Bf7#
        • 2.Qe5#
      • 1...Sb5
        • 2.Qe5#
      • 1...Kxc6!
    • 1.Bxc3?
      • 1...Kc4
        • 2.Bf7#
        • 2.Qb3#
        • 2.Qb5#
      • 1...Ke4!
    • 1.Bf7+?
      • 1...Kxd4
        • 2.Qf4#
      • 1...Ke4!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe5!
  • Keys
    • 1.Sf5!
      • 1...Kc4
        • 2.Bf7#
      • 1...Ke4
        • 2.Sxc3#
      • 1...Kc6
        • 2.Se7#
      • 1...Ke6
        • 2.Qd6#
      • 1...Sxe2
        • 2.Qe5#
      • 1...Sxa4
        • 2.Qe5#
      • 1...Sb1
        • 2.Qe5#
      • 1...Sd1
        • 2.Qe5#
      • 1...Sa2
        • 2.Qe5#
      • 1...Se4
        • 2.Bf7#
        • 2.Qe5#
        • 2.Qb3#
      • 1...Sb5
        • 2.Qe5#

Anticipated by 48611(0000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::B(G)
        • K(b);S_FLIGHT::QAR1(H)
        • S(a);XP(C)::QAR1(H)
        • S(a);XS(D)::QAR1(H)
        • S(a);::QAR1(H)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT
    • Try
      • S(E);
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::B(G)
        • K(b);S_FLIGHT::QAR1(H)
        • S(a);XP(C)::QAR1(H)
        • S(a);XS(D)::QAR1(H)
        • S(a);::QAR1(H)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT,XS(E)
    • Try
      • B(B);XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(G);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a),XS(E)::QAR2(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(b);OGATE,P_SPINS(a),S_FLIGHT::QAR1(H)
      • Refutation
        • K(b);P-FLIGHT,XQ(H)
  • Actual
    • S(E);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::B(G)
      • K(b);S_FLIGHT::S(D),XS(a)
      • K(b);P_SPINS(a),S_FLIGHT::S(E)
      • K(b);S_FLIGHT::QAR1(H)
      • S(a);XP(C)::QAR1(H)
      • S(a);XS(D)::QAR1(H)
      • S(a);::QAR1(H)
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