MESON Chess Problem Database

Problem Display
PID: 132914 (8/7p/6p1/4N2k/5Q2/8/7p/7K w - - 0 1)

Akerblom, Johan Axel

Tidskrift for Schack, 1930

8/7p/6p1/4N2k/5Q2/8/7p/7K

#2

3 + 4

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Qxh2#
    • 1...h6
      • 2.Qg4#
  • Tries
    • 1.Kxh2?
      • 1...h6
        • 2.Qg4#
      • 1...g5!
    • 1.Sf7?
      • threat
        • 2.Qg5#
      • 1...g5
        • 2.Qxg5#
      • 1...h6!
    • 1.Qg3?
      • 1...h6
        • 2.Qg4#
      • 1...g5
        • 2.Qxh2#
        • 2.Qh3#
      • 1...Kh6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qg5#
        • 2.Qh4#
      • 1...g5
        • 2.Qxg5#
      • 1...h6
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR(B),XP(a)
    • P(d);SBLOCK::QAB1(B)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • P(d);SBLOCK::QAB1(B)
      • Refutation
        • P(c);
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • P(c);::QAR1(B),XP(c)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Vars
        • P(d);SBLOCK::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • P(c);::QAR1(B),XP(c)
      • P(d);SBLOCK::QAR1(B)
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