MESON Chess Problem Database

Problem Display
PID: 169295 (2Q5/1p2N3/2q5/2k1K2R/2p5/8/8/1R6 w - - 0 1)

Khramtsevich, Mikhail Nikolaevich

Novitski, Petr Adrinovich

2nd Prize, SuperProblem 186. TT, 2017

2Q5/1p2N3/2q5/2k1K2R/2p5/8/8/1R6

#2

5 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7+
      • 2.Qxc7#
    • 1...b5
      • 2.Qxc6#
    • 1...b6
      • 2.Qxc6#
  • Tries
    • 1.Sxc6?
      • threat
        • 2.Ke6#
        • 2.Sd4#
        • 2.Sa5#
        • 2.Sa7#
        • 2.Se7#
        • 2.Sb8#
        • 2.Sd8#
      • 1...bxc6
        • 2.Qf8#
      • 1...c3
        • 2.Sd4#
        • 2.Sa5#
        • 2.Sa7#
        • 2.Se7#
        • 2.Sb8#
        • 2.Sd8#
      • 1...b5!
    • 1.Rxb7?
      • threat
        • 2.Qxc6#
      • 1...Qc7+
        • 2.Qxc7#
      • 1...Qxc8!
    • 1.Rh3?
      • 1...Qc7+
        • 2.Qxc7#
      • 1...c3
        • 2.Rxc3#
      • 1...b5
        • 2.Qxc6#
      • 1...b6
        • 2.Qxc6#
      • 1...Qxc8!
    • 1.Rh8?
      • 1...Qc7+
        • 2.Qxc7#
      • 1...Qxc8
        • 2.Rxc8#
      • 1...b5
        • 2.Qxc6#
      • 1...b6
        • 2.Qxc6#
      • 1...c3!
    • 1.Qd7?
      • threat
        • 2.Qd4#
      • 1...Qe4+
        • 2.Kxe4#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qd6+
        • 2.Qxd6#
      • 1...Qe6+
        • 2.Kxe6#
      • 1...Qf6+
        • 2.Kxf6#
      • 1...Qc7+
        • 2.Qxc7#
      • 1...Qxd7!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qd4#
      • 1...Qe4+
        • 2.Kxe4#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qd6+
        • 2.Qxd6#
      • 1...Qe6+
        • 2.Kxe6#
      • 1...Qf6+
        • 2.Kxf6#
      • 1...Qc7+
        • 2.Qxc7#
      • 1...Qd7
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(c);CHECK,OGATEB::QAR2(E),XQ(c)
    • P(d);N_GUARD::QAR1(E),XQ(c)
  • Tries
    • Try
      • S(D);XQ(c)
      • Threat
        • DUALS(7)
      • Vars
        • P(d);P_SPINP(d),SBLOCK,XS(D)::QAB(E)
      • Refutation
        • P(d);
    • Try
      • R(A);XP(d)
      • Threat
        • QAR1(E),XQ(c)
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(E),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(E)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(E),XQ(c)
        • P(a);OGATEB::R(C),XP(a)
        • P(d);N_GUARD::QAR1(E),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(E)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(E),XQ(c)
        • Q(c);N_SPINQ(c),OGATE,XQ(E)::R(C),XQ(c)
        • P(d);N_GUARD::QAR1(E),XQ(c)
      • Refutation
        • P(a);
    • Try
      • Q(E);N_PINQ(c)
      • Threat
        • QAB1(E)
      • Vars
        • Q(c);CHECK::R(C)+K(B),XQ(c)
        • Q(c);CHECK,N_GUARD::QAR1(E),XQ(c)
        • Q(c);CHECK,N_GUARD::QAB1(E),XQ(c)
        • Q(c);CHECK,OGATEB::QAR2(E),XQ(c)
      • Refutation
        • Q(c);XQ(E)
  • Actual
    • Q(E);N_PINQ(c)
    • Threat
      • QAB1(E)
    • Vars
      • Q(c);CHECK::R(C)+K(B),XQ(c)
      • Q(c);CHECK,N_GUARD::QAR1(E),XQ(c)
      • Q(c);CHECK,N_GUARD::QAB1(E),XQ(c)
      • Q(c);CHECK,OGATEB::QAR2(E),XQ(c)
      • Q(c);N_GUARD::QAB1(E)
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