MESON Chess Problem Database

Problem Display
PID: 15910 (8/8/8/8/5K2/6pk/3Q2Nq/3R4 w - - 0 1)

Kichigin, Viktor Vladimirovich

Comm., Die Schwalbe, 1989

8/8/8/8/5K2/6pk/3Q2Nq/3R4

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Rxh1#
  • Tries
    • 1.Kf3?
      • threat
        • 2.Qh6#
        • 2.Qd7#
      • 1...Qg1
        • 2.Qh6#
      • 1...Qh1
        • 2.Rxh1#
        • 2.Qh6#
      • 1...Qxg2+!
    • 1.Kf5?
      • 1...Qxg2
        • 2.Qh6#
      • 1...Qh1
        • 2.Rxh1#
      • 1...Qg1!
    • 1.Qe1?
      • 1...Kxg2
        • 2.Qf1#
      • 1...Qg1
        • 2.Qxg3#
      • 1...Qh1
        • 2.Qxg3#
        • 2.Qxh1#
      • 1...Qxg2!
    • 1.Qc3?
      • 1...Qxg2
        • 2.Qh8#
      • 1...Qg1
        • 2.Qxg3#
      • 1...Qh1
        • 2.Qxg3#
      • 1...Kxg2!
    • 1.Qb2?
      • 1...Qxg2
        • 2.Qh8#
      • 1...Qh1
        • 2.Rxh1#
      • 1...Qg1!
    • 1.Qc2?
      • 1...Qxg2
        • 2.Qh7#
      • 1...Qh1
        • 2.Rxh1#
      • 1...Qg1!
    • 1.Qe2?
      • 1...Qxg2
        • 2.Qh5#
      • 1...Qh1
        • 2.Rxh1#
      • 1...Qg1!
    • 1.Qd5?
      • 1...Qxg2
        • 2.Qh5#
      • 1...Qh1
        • 2.Rxh1#
      • 1...Qg1!
  • Keys
    • 1.Qd3!
      • 1...Kxg2
        • 2.Qf1#
      • 1...Qxg2
        • 2.Qh7#
      • 1...Qg1
        • 2.Qxg3#
      • 1...Qh1
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATEB::R(A),XQ(a)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);::QAR(B)
      • Refutation
        • Q(a);CHECK,XS(C)
    • Try
      • K(D);P-FLIGHT
      • Vars
        • Q(a);SBLOCK,XS(C)::QAR(B)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);
    • Try
      • Q(B);
      • Vars
        • K(c);OGATEB,S_FLIGHT,XS(C)::QAB1(B)
        • Q(a);N_GUARD::QAR1(B),XP(b)
      • Refutation
        • Q(a);XS(C)
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • Q(a);SBLOCK,XS(C)::QAR(B)
        • Q(a);N_GUARD::QAR1(B),XP(b)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XS(C)
    • Try
      • Q(B);
      • Vars
        • Q(a);SBLOCK,XS(C)::QAR(B)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);
    • Try
      • Q(B);
      • Vars
        • Q(a);SBLOCK,XS(C)::QAR(B)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);
    • Try
      • Q(B);
      • Vars
        • Q(a);SBLOCK,XS(C)::QAR2(B)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);
    • Try
      • Q(B);
      • Vars
        • Q(a);SBLOCK,XS(C)::QAR2(B)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);
  • Actual
    • Q(B);P_PINP(b)
    • Vars
      • K(c);N_SPINP(b),OGATEB,S_FLIGHT,XS(C)::QAB1(B)
      • Q(a);SBLOCK,XS(C)::QAR(B)
      • Q(a);N_GUARD::QAR1(B),XP(b)
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