MESON Chess Problem Database

Problem Display
PID: 103972 (8/8/2p5/2Kp4/8/k7/b1Q1N3/8 w - - 0 1)

Paalanen, Erkki

Borsodi Vegyesz, 1965-1966

8/8/2p5/2Kp4/8/k7/b1Q1N3/8

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sc1?
      • threat
        • 2.Qxa2#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bb1
        • 2.Qb3#
      • 1...Bc4!
    • 1.Sd4?
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bb1
        • 2.Qb3#
      • 1...Bc4!
    • 1.Qb2+?
      • 1...Ka4
        • 2.Qxa2#
        • 2.Qb4#
      • 1...Kxb2!
    • 1.Qc3+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Bb3!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qxa2#
      • 1...Bb1
        • 2.Sxb1#
      • 1...Bb3
        • 2.Qc1#
      • 1...Bc4
        • 2.Sb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A),XB(a)
      • Vars
        • B(a);N_GUARD::QAR1(A),XB(a)
        • B(a);N_GUARD::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • S(B);
      • Vars
        • B(a);N_GUARD::QAR1(A),XB(a)
        • B(a);N_GUARD::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(B);
    • Threat
      • QAR1(A),XB(a)
    • Vars
      • B(a);N_GUARD::S(B),XB(a)
      • B(a);SBLOCK::QAB(A)
      • B(a);N_GUARD::S(B)
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