MESON Chess Problem Database

Problem Display
PID: 232971 (rk1N4/Np1K4/4Q3/8/8/8/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 2000

rk1N4/Np1K4/4Q3/8/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Sac6#
      • 2.Qb6#
    • 1...b6
      • 2.Sac6#
      • 2.Qxb6#
  • Tries
    • 1.Sf7?
      • 1...Rxa7
        • 2.Qe8#
      • 1...b5
        • 2.Qb6#
      • 1...b6
        • 2.Qxb6#
      • 1...Kxa7!
    • 1.Qa2?
      • 1...b5
        • 2.Sac6#
      • 1...b6
        • 2.Sac6#
      • 1...Rxa7!
    • 1.Qb3?
      • threat
        • 2.Sac6#
        • 2.Sdc6#
        • 2.Qxb7#
      • 1...Kxa7
        • 2.Qxb7#
      • 1...b5
        • 2.Sac6#
      • 1...b6
        • 2.Sac6#
        • 2.Qxb6#
      • 1...Rxa7!
    • 1.Qc4?
      • 1...Rxa7
        • 2.Qc8#
      • 1...b5
        • 2.Sac6#
        • 2.Qc7#
      • 1...b6
        • 2.Sac6#
        • 2.Qc7#
      • 1...Kxa7!
    • 1.Qd5?
      • threat
        • 2.Qxb7#
      • 1...Kxa7
        • 2.Qxb7#
      • 1...b5
        • 2.Sac6#
        • 2.Qb7#
      • 1...b6
        • 2.Sac6#
        • 2.Qb7#
      • 1...Rxa7!
    • 1.Qg8?
      • threat
        • 2.Sdc6#
      • 1...b5
        • 2.Sac6#
      • 1...b6
        • 2.Sac6#
      • 1...Kxa7!
    • 1.Qe3?
      • 1...b6
        • 2.Sac6#
        • 2.Qxb6#
      • 1...b5
        • 2.Sac6#
        • 2.Qb6#
      • 1...Rxa7!
    • 1.Qe4?
      • threat
        • 2.Qxb7#
      • 1...Kxa7
        • 2.Qxb7#
      • 1...b5
        • 2.Sac6#
        • 2.Qb7#
      • 1...b6
        • 2.Sac6#
        • 2.Qb7#
      • 1...Rxa7!
    • 1.Qa6?
      • threat
        • 2.Qxb7#
      • 1...bxa6
        • 2.Sac6#
      • 1...b5
        • 2.Sac6#
        • 2.Sdc6#
        • 2.Qb7#
        • 2.Qb6#
      • 1...b6
        • 2.Sac6#
        • 2.Sdc6#
        • 2.Qb7#
        • 2.Qxb6#
      • 1...Rxa7!
    • 1.Qe8?
      • threat
        • 2.Sdc6#
      • 1...b5
        • 2.Sac6#
      • 1...b6
        • 2.Sac6#
      • 1...Kxa7!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxb7#
      • 1...Kxa7
        • 2.Qxb7#
      • 1...Rxa7
        • 2.Qc8#
      • 1...bxc6
        • 2.Saxc6#
      • 1...b5
        • 2.Qb7#
        • 2.Qb6#
        • 2.Qc7#
      • 1...b6
        • 2.Qb7#
        • 2.Qxb6#
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • R(b);SBLOCK,XS(B)::QAR(A)
        • P(a);OGATEB::QAR2(A)
        • P(a);OGATEB::QAR2(A),XP(a)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • Q(A);
      • Vars
        • P(a);N_GUARD::S(B)
      • Refutation
        • R(b);XS(B)
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • DUALS(3)
      • Vars
        • K(c);N_SPINP(a),S_FLIGHT,XS(B)::QAR1(A),XP(a)
        • P(a);::S(B)
      • Refutation
        • R(b);XS(B)
    • Try
      • Q(A);
      • Vars
        • R(b);SBLOCK,XS(B)::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(c);S_FLIGHT,XS(B)::QAR1(A),XP(a)
      • Refutation
        • R(b);XS(B)
    • Try
      • Q(A);
      • Threat
        • QAR(A)+S(D),DCHECK
      • Vars
        • P(a);N_GUARD::S(B)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • Q(A);
      • Refutation
        • R(b);XS(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(c);S_FLIGHT,XS(B)::QAR1(A),XP(a)
      • Refutation
        • R(b);XS(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • P(a);N_GUARD,XQ(A)::S(B)
      • Refutation
        • R(b);XS(B)
    • Try
      • Q(A);
      • Threat
        • QAR(A)+S(D),DCHECK
      • Vars
        • P(a);N_GUARD::S(B)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(a)
    • Vars
      • K(c);S_FLIGHT,XS(B)::QAR1(A),XP(a)
      • R(b);SBLOCK,XS(B)::QAR1(A)
      • P(a);XQ(A)::S(B),XP(a)
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