MESON Chess Problem Database

Problem Display
PID: 90757 (3K4/1bn5/3kp3/N7/5p2/2Q1P3/8/8 w - - 0 1)

Groeneveld, Cornelis

Die Schwalbe, 1968

3K4/1bn5/3kp3/N7/5p2/2Q1P3/8/8

#2

4 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd4#
    • 1...Bd5
      • 2.Qxc7#
    • 1...Sd5
      • 2.Sxb7#
  • Tries
    • 1.Qb4+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke5!
  • Keys
    • 1.exf4!
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Bd5
        • 2.Qb4#
        • 2.Qa3#
        • 2.Qxc7#
      • 1...Sd5
        • 2.Sxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR1(A)
    • B(d);SBLOCK::QAB1(A),XS(e)
    • S(e);SBLOCK::S(C),XB(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • P(B);XP(a)
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • P(c);::QAB1(A),XP(c)
      • S(e);SBLOCK::S(C),XB(d)
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