MESON Chess Problem Database

Problem Display
PID: 200709 (8/2p5/P1p5/k7/6K1/8/1R6/NQn5 w - - 0 1)

Chernikh, Vassily

Zadachi i Etyudi, 2017

8/2p5/P1p5/k7/6K1/8/1R6/NQn5

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Rxa2#
      • 2.Qxa2#
    • 1...Se2
      • 2.Ra2#
      • 2.Qa2#
    • 1...Sd3
      • 2.Ra2#
      • 2.Qa2#
  • Tries
    • 1.Rb7?
      • 1...Ka4
        • 2.Qb4#
      • 1...Sa2
        • 2.Qxa2#
      • 1...Se2
        • 2.Qa2#
      • 1...Sb3
        • 2.Qa2#
      • 1...Sd3
        • 2.Qa2#
      • 1...c5
        • 2.Qb5#
      • 1...Kxa6!
    • 1.a7?
      • threat
        • 2.a8Q#
        • 2.a8R#
      • 1...Ka4
        • 2.a8Q#
        • 2.a8R#
      • 1...Ka6
        • 2.a8Q#
        • 2.a8R#
      • 1...Sa2
        • 2.Rxa2#
        • 2.Qxa2#
        • 2.a8Q#
        • 2.a8R#
      • 1...Se2
        • 2.Ra2#
        • 2.Qa2#
        • 2.a8Q#
        • 2.a8R#
      • 1...Sd3
        • 2.Ra2#
        • 2.Qa2#
        • 2.a8Q#
        • 2.a8R#
      • 1...c5
        • 2.a8Q#
        • 2.a8R#
      • 1...Sb3!
  • Keys
    • 1.Rb8!
      • 1...Ka4
        • 2.Qb4#
      • 1...Kxa6
        • 2.Ra8#
      • 1...Sa2
        • 2.Qxa2#
      • 1...Se2
        • 2.Qa2#
      • 1...Sb3
        • 2.Qa2#
      • 1...Sd3
        • 2.Qa2#
      • 1...c5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • S(a);N_GUARD::QAR(B),XS(a)
        • S(a);N_GUARD::QAR(B)
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT,XP(E)
    • Try
      • P(E);
      • Threat
        • P=Q
      • Vars
        • K(b);P-FLIGHT::P=Q
        • P(c);::P=Q
      • Refutation
        • S(a);
  • Actual
    • R(C);
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);OGATEB,P-FLIGHT,XP(E)::R(C)
      • S(a);N_GUARD::QAR(B),XS(a)
      • S(a);N_GUARD::QAR(B)
      • P(c);N_GUARD::QAR1(B)
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