MESON Chess Problem Database

Problem Display
PID: 79539 (8/8/1B3p2/8/8/n6K/8/Qb5k w - - 0 1)

ten Cate, Pieter

Sjakk-Nytt, 1947

8/8/1B3p2/8/8/n6K/8/Qb5k

#2

3 + 4

3713 Snap 2008
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qa8#
    • 1...Sc4
      • 2.Qxb1#
    • 1...Sb5
      • 2.Qxb1#
  • Tries
    • 1.Bf2?
      • 1...Sc2
        • 2.Qa8#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...f5!
    • 1.Be3?
      • 1...Sc2
        • 2.Qa8#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...f5!
    • 1.Bd4?
      • 1...Sc2
        • 2.Qa8#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...f5!
    • 1.Bc5?
      • 1...Sc2
        • 2.Qa8#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...f5!
    • 1.Qd4?
      • threat
        • 2.Qg1#
        • 2.Qd1#
      • 1...Bc2
        • 2.Qg1#
      • 1...Bd3
        • 2.Qg1#
      • 1...Sc2
        • 2.Qg1#
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bf5+!
    • 1.Qxf6?
      • threat
        • 2.Qf1#
        • 2.Qf3#
      • 1...Bd3
        • 2.Qf3#
      • 1...Be4
        • 2.Qf1#
      • 1...Bf5+!
  • Keys
    • 1.Kg3!
      • 1...Sc2
        • 2.Qa8#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...f5
        • 2.Qh8#

Anticipated by 22047(1923), 22054(1924), 203312(1924), 81448(1929), 71670(1931)

This anticipates 150450(1948)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE::QAB(A)
    • S(c);N_GUARD::QAR(A),XB(a)
  • Tries
    • Try
      • B(C);
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(a)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(a)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(a)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(a)
      • Refutation
        • P(d);
    • Try
      • Q(A);N_PINB(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR1(A)
      • Refutation
        • B(a);CHECK
    • Try
      • Q(A);N_PINB(a),XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB(A)
        • B(a);::QAR2(A)
      • Refutation
        • B(a);CHECK
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • S(c);OGATE::QAB(A)
      • S(c);N_GUARD::QAR(A),XB(a)
      • P(d);OGATE::QAB(A)
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