MESON Chess Problem Database

Problem Display
PID: 169117 (2QR4/5Npk/4P2P/4P1p1/6K1/3P4/8/8 w - - 0 1)

Janevski, Zivko

HM., SuperProblem 087. TT, 2013

2QR4/5Npk/4P2P/4P1p1/6K1/3P4/8/8

#2

8 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...g6
      • 2.Rh8#
  • Tries
    • 1.Rd7?
      • 1...gxh6
        • 2.Sh8#
      • 1...g6
        • 2.Qh8#
      • 1...Kg6!
    • 1.Rg8?
      • threat
        • 2.Rxg7#
      • 1...Kg6
        • 2.Rxg7#
      • 1...g6
        • 2.Rg7#
        • 2.Rh8#
      • 1...gxh6!
    • 1.Qd7?
      • 1...gxh6
        • 2.Sh8#
      • 1...g6
        • 2.Rh8#
      • 1...Kg6!
    • 1.Qc2?
      • 1...Kg6
        • 2.d4#
      • 1...g6
        • 2.Rh8#
      • 1...gxh6!
    • 1.Qc4?
      • 1...Kg6
        • 2.Qe4#
      • 1...g6
        • 2.Rh8#
      • 1...gxh6!
    • 1.Qc6?
      • 1...Kg6
        • 2.Qe4#
      • 1...g6
        • 2.Rh8#
      • 1...gxh6!
    • 1.Qc7?
      • 1...gxh6
        • 2.Sh8#
      • 1...g6
        • 2.Rh8#
      • 1...Kg6!
    • 1.Qa8?
      • 1...Kg6
        • 2.Qe4#
      • 1...g6
        • 2.Rh8#
      • 1...gxh6!
    • 1.d4?
      • 1...Kg6
        • 2.Qc2#
      • 1...g6
        • 2.Rh8#
      • 1...gxh6!
    • 1.e7?
      • 1...Kg6
        • 2.Qf5#
      • 1...g6
        • 2.Rh8#
      • 1...gxh6!
    • 1.hxg7?
      • threat
        • 2.g8Q#
      • 1...Kg6
        • 2.g8Q#
      • 1...Kxg7!
  • Keys
    • 1.Qb7!
      • 1...Kg6
        • 2.Qe4#
      • 1...gxh6
        • 2.Sh8#
      • 1...g6
        • 2.Rh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::R1(H)
  • Tries
    • Try
      • R(H);
      • Vars
        • P(b);SBLOCK,XP(E)::R(H)+S(F)
        • P(b);SBLOCK::QAR1(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(H);
      • Threat
        • R1(H),XP(b)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::R1(H),XP(b)
      • Refutation
        • P(b);XP(E)
    • Try
      • Q(G);
      • Vars
        • P(b);SBLOCK,XP(E)::QAR(G)+S(F)
        • P(b);SBLOCK::R1(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(c);S_FLIGHT::QAB(G)+P(A)
        • P(b);SBLOCK::R1(H)
      • Refutation
        • P(b);XP(E)
    • Try
      • Q(G);
      • Vars
        • K(c);S_FLIGHT::QAB(G)
        • P(b);SBLOCK::R1(H)
      • Refutation
        • P(b);XP(E)
    • Try
      • Q(G);
      • Vars
        • K(c);S_FLIGHT::QAB(G)
        • P(b);SBLOCK::R1(H)
      • Refutation
        • P(b);XP(E)
    • Try
      • Q(G);
      • Vars
        • P(b);SBLOCK,XP(E)::QAR(G)+S(F)
        • P(b);SBLOCK::R1(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(c);S_FLIGHT::QAB(G)
        • P(b);SBLOCK::R1(H)
      • Refutation
        • P(b);XP(E)
    • Try
      • P(A);
      • Vars
        • K(c);S_FLIGHT::QAB(G)
        • P(b);SBLOCK::R1(H)
      • Refutation
        • P(b);XP(E)
    • Try
      • P(D);
      • Vars
        • K(c);S_FLIGHT::QAB1(G)
        • P(b);SBLOCK::R1(H)
      • Refutation
        • P(b);XP(E)
    • Try
      • P(E);XP(b)
      • Threat
        • P=Q
      • Vars
        • K(c);S_FLIGHT::P=Q
      • Refutation
        • K(c);P-FLIGHT,XP(E)
  • Actual
    • Q(G);
    • Vars
      • K(c);S_FLIGHT::QAB(G)
      • P(b);SBLOCK,XP(E)::QAR(G)+S(F)
      • P(b);SBLOCK::R1(H)
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