MESON Chess Problem Database

Problem Display
PID: 106215 (8/2KN4/p7/1kB5/6Q1/b7/8/8 w - - 0 1)

Wrobel, Marian

Glos Pracy, 1954

8/2KN4/p7/1kB5/6Q1/b7/8/8

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qb4#
    • 1...Bb2
      • 2.Qb4#
    • 1...Bb4
      • 2.Qxb4#
  • Tries
    • 1.Bxa3?
      • threat
        • 2.Qb4#
      • 1...Ka5
        • 2.Qb4#
      • 1...a5!
    • 1.Qc4+?
      • 1...Ka5
        • 2.Bb6#
      • 1...Kxc4!
  • Keys
    • 1.Sb6!
      • 1...Ka5
        • 2.Qa4#
      • 1...Kxc5
        • 2.Qc4#
      • 1...Bxc5
        • 2.Qa4#
      • 1...Bc1
        • 2.Qb4#
      • 1...Bb2
        • 2.Qb4#
      • 1...Bb4
        • 2.Qxb4#
      • 1...a5
        • 2.Qc4#

Anticipated by 46464(1939)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR1(A)
    • B(a);N_GUARD::QAR1(A),XB(a)
  • Tries
    • Try
      • B(B);XB(a)
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • S(D);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);P-FLIGHT,XB(B)::QAR1(A)
      • B(a);SBLOCK,XB(B)::QAB1(A)
      • B(a);N_GUARD::QAR1(A)
      • B(a);N_GUARD::QAR1(A),XB(a)
      • P(c);SBLOCK::QAB1(A)
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