MESON Chess Problem Database

Problem Display
PID: 81448 (8/8/2p5/8/8/K2B3n/8/k5bQ w - - 0 1)

Akerblom, Johan Axel

Boswell, Edward

Svenska Dagbladet, 1929

8/8/2p5/8/8/K2B3n/8/k5bQ

#2

3 + 4

5454 Near Snap 2009
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qh8#
    • 1...Sf4
      • 2.Qxg1#
    • 1...Sg5
      • 2.Qxg1#
  • Tries
    • 1.Bc2?
      • 1...Sf2
        • 2.Qh8#
      • 1...Sf4
        • 2.Qxg1#
      • 1...Sg5
        • 2.Qxg1#
      • 1...c5!
    • 1.Be4?
      • 1...Sf2
        • 2.Qh8#
      • 1...Sf4
        • 2.Qxg1#
      • 1...Sg5
        • 2.Qxg1#
      • 1...c5!
    • 1.Bf5?
      • 1...Sf2
        • 2.Qh8#
      • 1...Sf4
        • 2.Qxg1#
      • 1...Sg5
        • 2.Qxg1#
      • 1...c5!
    • 1.Bg6?
      • 1...Sf2
        • 2.Qh8#
      • 1...Sf4
        • 2.Qxg1#
      • 1...Sg5
        • 2.Qxg1#
      • 1...c5!
    • 1.Qxc6?
      • threat
        • 2.Qc1#
        • 2.Qc3#
      • 1...Be3
        • 2.Qc3#
      • 1...Bd4
        • 2.Qc1#
      • 1...Bc5+!
  • Keys
    • 1.Kb3!
      • 1...Sf2
        • 2.Qh8#
      • 1...Sf4
        • 2.Qxg1#
      • 1...Sg5
        • 2.Qxg1#
      • 1...c5
        • 2.Qa8#

Anticipated by 22047(1923), 203312(1924), 22054(1924)

This anticipates 71670(1931), 79539(1947), 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(b)
  • Tries
    • Try
      • B(C);
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(b)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(b)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(b)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(b)
      • Refutation
        • P(d);
    • Try
      • Q(A);N_PINB(b),XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAB(A)
        • B(b);::QAR2(A)
      • Refutation
        • B(b);CHECK
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • S(c);OGATE::QAB(A)
      • S(c);N_GUARD::QAR(A),XB(b)
      • P(d);OGATE::QAB(A)
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