MESON Chess Problem Database

Problem Display
PID: 85707 (8/8/4R1p1/3P1k2/7Q/7b/6p1/6K1 w - - 0 1)

Speckmann, Werner

Freie Presse, 1965

8/8/4R1p1/3P1k2/7Q/7b/6p1/6K1

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Qf6#
    • 1...g5
      • 2.Qe4#
  • Tries
    • 1.Qd4?
      • 1...Bg4
        • 2.Qe5#
        • 2.Qf6#
      • 1...g5
        • 2.Rf6#
        • 2.Qe4#
      • 1...Kg5!
    • 1.d6?
      • 1...Bg4
        • 2.Qf6#
      • 1...g5
        • 2.Qe4#
      • 1...Kxe6!
  • Keys
    • 1.Qg3!
      • 1...Bg4
        • 2.Qe5#
      • 1...g5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::QAR1(B)
    • P(d);SBLOCK::QAB1(B)
  • Tries
    • Try
      • Q(B);
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(C);
      • Vars
        • B(b);SBLOCK::QAR1(B)
        • P(d);SBLOCK::QAB1(B)
      • Refutation
        • K(c);S_FLIGHT,XR(D)
  • Actual
    • Q(B);
    • Vars
      • B(b);SBLOCK::QAR1(B)
      • P(d);SBLOCK::QAR2(B)
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