MESON Chess Problem Database

Problem Display
PID: 176190 (4R2b/8/4pkN1/8/4Q3/7K/8/8 w - - 0 1)

Lossa, Gunter

Schach-Echo, 1968

4R2b/8/4pkN1/8/4Q3/7K/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sh4?
      • 1...Kf7
        • 2.Qg6#
      • 1...Kg7
        • 2.Qg6#
      • 1...Bg7
        • 2.Qf4#
      • 1...e5
        • 2.Qg6#
      • 1...Kg5!
    • 1.Se5?
      • 1...Kg7
        • 2.Qg6#
      • 1...Bg7
        • 2.Qf4#
      • 1...Kg5!
    • 1.Sf8?
      • 1...Kf7
        • 2.Qg6#
      • 1...Kg7
        • 2.Qg6#
      • 1...Bg7
        • 2.Qf4#
      • 1...e5
        • 2.Qg6#
      • 1...Kg5!
    • 1.Sxh8?
      • 1...Kg7
        • 2.Qg6#
      • 1...e5
        • 2.Qg6#
        • 2.Qxe5#
      • 1...Kg5!
  • Keys
    • 1.Se7!
      • 1...Kg5
        • 2.Qh4#
      • 1...Kf7
        • 2.Qg6#
      • 1...Kg7
        • 2.Qg6#
      • 1...e5
        • 2.Qg6#
      • 1...Bg7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
        • K(b);S_FLIGHT::QAR1(B)
        • B(c);SBLOCK::QAR2(B)
        • P(a);::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • B(c);SBLOCK::QAR2(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
        • K(b);S_FLIGHT::QAR1(B)
        • B(c);SBLOCK::QAR2(B)
        • P(a);::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);XB(c)
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • K(b);P-FLIGHT::QAB1(B)
      • K(b);S_FLIGHT::QAR1(B)
      • P(a);SBLOCK::QAR1(B)
      • B(c);SBLOCK::QAR2(B)
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