MESON Chess Problem Database

Problem Display
PID: 16260 (1n6/1p5p/prk5/1rPR2PK/8/8/7B/RQ5B w - - 0 1)

Markov, Evgeny Viktorovich

The Problemist, 2000

1n6/1p5p/prk5/1rPR2PK/8/8/7B/RQ5B

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qxb6#
    • 1...Sd7
      • 2.Rf5#
    • 1...h6
      • 2.Qg6#
  • Tries
    • 1.Qb4?
      • threat
        • 2.Rdd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Rd4#
        • 2.Rd8#
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Sd7
        • 2.Rdd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Rd4#
        • 2.Rf5#
      • 1...Rxb4!
  • Keys
    • 1.Ra5!
      • 1...Rxb1
        • 2.Rd1#
      • 1...Rxa5
        • 2.Qxb6#
      • 1...Rxc5
        • 2.Raxc5#
      • 1...Rb2
        • 2.Rd2#
      • 1...Rb3
        • 2.Rd3#
      • 1...Rb4
        • 2.Rd4#
      • 1...Sd7
        • 2.Rf5#
      • 1...h6
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE::QAR1(B),XR(c)
    • S(g);SBLOCK::B(C)+R(F)
    • P(f);N_GUARD::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(5)
      • Vars
        • R(a);OGATE,XP(E)::QAR1(B),XR(a)
      • Refutation
        • R(a);XQ(B)
  • Actual
    • R(A);
    • Vars
      • R(a);XQ(B)::B(C)+R(F)
      • R(a);OGATE,XR(A)::QAR1(B),XR(c)
      • R(a);OGATE,XP(E)::R1(A),XR(a)
      • R(a);::B(C)+R(F)
      • S(g);SBLOCK::B(C)+R(F)
      • P(f);N_GUARD::QAR(B)
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