MESON Chess Problem Database

Problem Display
PID: 161620 (8/3Q1K2/7p/6k1/7n/8/5R1B/8 w - - 0 1)

Antonov, Yuri Mikhailovich

Sa ogneupory, 1987

8/3Q1K2/7p/6k1/7n/8/5R1B/8

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...h5
      • 2.Bf4#
  • Tries
    • 1.Rg2+?
      • 1...Kh5
        • 2.Qg4#
      • 1...Sxg2!
    • 1.Rf4?
      • threat
        • 2.Qg4#
      • 1...Kh5
        • 2.Qg4#
      • 1...Sf5
        • 2.Qxf5#
      • 1...h5!
  • Keys
    • 1.Qh3!
      • 1...Kh5
        • 2.Rf5#
      • 1...Sg2
        • 2.Rxg2#
        • 2.Rf5#
      • 1...Sf3
        • 2.Rg2#
      • 1...Sf5
        • 2.Bf4#
        • 2.Rxf5#
      • 1...Sg6
        • 2.Rg2#
        • 2.Rf5#
      • 1...h5
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::B(B)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • S(a);XR(A)
    • Try
      • R(A);
      • Threat
        • QAR1(C)
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT,P_SPINS(a)::R(A)
      • S(a);N_GUARD::R(A)
      • P(c);SBLOCK::B(B)
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