MESON Chess Problem Database

Problem Display
PID: 231238 (8/5Kn1/7b/6k1/8/6P1/4QP2/8 w - - 0 1)

Gavrilov, Constantin Grigorievich

Revista de Sah, 1927

8/5Kn1/7b/6k1/8/6P1/4QP2/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.f4#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qg6#
      • 1...Kh5
        • 2.Qg6#
        • 2.Qh4#
      • 1...Sf5!
    • 1.Qe6?
      • threat
        • 2.Qg6#
      • 1...Kh5
        • 2.Qg6#
      • 1...Sxe6!
  • Keys
    • 1.f3!
      • 1...Kf5
        • 2.Qb5#
      • 1...Kh5
        • 2.f4#
      • 1...Sf5
        • 2.f4#
      • 1...Sh5
        • 2.Qb5#
        • 2.Qe5#
      • 1...Se6
        • 2.Qe5#
      • 1...Se8
        • 2.Qb5#
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::P(B)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • S(c);XQ(A)
  • Actual
    • P(B);
    • Vars
      • K(a);P-FLIGHT::QAR(A)
      • K(a);P-FLIGHT::QAB(A)+P(B)
      • S(c);SBLOCK::P(B)
      • S(c);N_GUARD::QAR2(A)
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