MESON Chess Problem Database

Problem Display
PID: 232990 (rkB5/R7/8/8/2nQ4/8/8/K7 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 2002

rkB5/R7/8/8/2nQ4/8/8/K7

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc8
      • 2.Qh8#
  • Tries
    • 1.Qb6+?
      • 1...Kxc8
        • 2.Qc7#
      • 1...Sxb6!
    • 1.Qg7?
      • threat
        • 2.Qb7#
        • 2.Qc7#
      • 1...Kxc8
        • 2.Rxa8#
        • 2.Qf8#
        • 2.Qh8#
        • 2.Qc7#
        • 2.Qg8#
      • 1...Sa5
        • 2.Qc7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Rxa7+!
    • 1.Qxc4?
      • threat
        • 2.Qc7#
      • 1...Kxa7
        • 2.Qc7#
      • 1...Rxa7+!
    • 1.Qe4?
      • threat
        • 2.Qb7#
        • 2.Qxa8#
      • 1...Kxa7
        • 2.Qb7#
      • 1...Kxc8
        • 2.Qxa8#
        • 2.Qe8#
      • 1...Sa5
        • 2.Qxa8#
      • 1...Sb6
        • 2.Qb7#
      • 1...Sd6
        • 2.Qxa8#
      • 1...Rxa7+!
    • 1.Qd5?
      • threat
        • 2.Qb7#
        • 2.Qxa8#
      • 1...Kxa7
        • 2.Qb7#
      • 1...Kxc8
        • 2.Qxa8#
        • 2.Qg8#
      • 1...Sa5
        • 2.Qxa8#
      • 1...Sb6
        • 2.Qb7#
      • 1...Sd6
        • 2.Qxa8#
      • 1...Rxa7+!
    • 1.Qd6+?
      • 1...Kxa7
        • 2.Qc7#
      • 1...Kxc8
        • 2.Qc7#
        • 2.Qf8#
      • 1...Sxd6!
    • 1.Qd7?
      • threat
        • 2.Qb7#
        • 2.Qc7#
      • 1...Sa5
        • 2.Qc7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Rxa7+!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qc7#
      • 1...Rxa7+
        • 2.Ba6#
      • 1...Kxa7
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,P-FLIGHT,XB(D)::QAR(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT,XB(D)::QAR1(B)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_PINR(C)::QAB1(B)
        • S(a);::QAB1(B)
      • Refutation
        • R(b);CHECK,XR(C)
    • Try
      • Q(B);XS(a)
      • Threat
        • QAB1(B)
      • Vars
        • K(c);S_FLIGHT,XR(C)::QAR2(B)
      • Refutation
        • R(b);CHECK,XR(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XR(C)::QAR1(B)
        • S(a);N_PINR(C)::QAR1(B),XR(b)
        • S(a);::QAR1(B)
        • S(a);::QAR1(B),XR(b)
      • Refutation
        • R(b);CHECK,XR(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XR(C)::QAR1(B)
        • S(a);N_PINR(C)::QAR1(B),XR(b)
        • S(a);::QAR1(B)
        • S(a);::QAR1(B),XR(b)
      • Refutation
        • R(b);CHECK,XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(C)::QAR2(B)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_PINR(C)::QAB1(B)
        • S(a);::QAB1(B)
      • Refutation
        • R(b);CHECK,XR(C)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • R(b);CHECK,SBLOCK,XR(C)::QAR(B)+B(D)
      • K(c);S_FLIGHT,XR(C)::QAR2(B)
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