MESON Chess Problem Database

Problem Display
PID: 245193 (k1K5/1Rpp4/7Q/8/8/3b4/8/8 w - - 0 1)

Pilchenko, Viacheslav Karlovich

Smena (Moscow), 1996

k1K5/1Rpp4/7Q/8/8/3b4/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qa6#
    • 1...Bc2
      • 2.Qa6#
    • 1...Be4
      • 2.Qa6#
    • 1...Bf5
      • 2.Qa6#
    • 1...Ba6
      • 2.Qxa6#
    • 1...Bh7
      • 2.Qa6#
  • Tries
    • 1.Kxc7?
      • threat
        • 2.Qf8#
        • 2.Qh8#
      • 1...Bc4
        • 2.Qf8#
      • 1...Bh7
        • 2.Qf8#
        • 2.Qa6#
      • 1...Bg6!
    • 1.Qe3?
      • threat
        • 2.Ra7#
        • 2.Rb8#
        • 2.Qa7#
      • 1...Ba6
        • 2.Qa7#
      • 1...c5!
    • 1.Qb6?
      • threat
        • 2.Ra7#
        • 2.Rb8#
        • 2.Qa7#
      • 1...Ba6
        • 2.Qa7#
        • 2.Qxa6#
      • 1...cxb6!
    • 1.Qh8?
      • threat
        • 2.Kxc7#
      • 1...Bg6
        • 2.Qa1#
      • 1...Bh7
        • 2.Qa1#
      • 1...c5
        • 2.Kc7#
      • 1...c6
        • 2.Kc7#
      • 1...Bc4!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Kxc7#
      • 1...Bg6
        • 2.Qa3#
      • 1...c5
        • 2.Kc7#
      • 1...c6
        • 2.Kc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(a);N_GUARD::QAR2(A)
    • B(a);N_GUARD,P_PINR(B)::QAR2(A),XB(a)
    • B(a);N_GUARD,SBLOCK::QAR2(A)
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);P_PINR(B)::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR(A)+K(C),XP(b)
      • Vars
        • B(a);N_GUARD::QAB(A)
        • B(a);N_GUARD,SBLOCK::QAB(A)
        • P(b);::QAR(A)+K(C)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+K(C),XP(b)
    • Vars
      • B(a);N_GUARD::QAR(A)
      • P(b);::QAR(A)+K(C)
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