MESON Chess Problem Database

Problem Display
PID: 239241 (8/8/8/1R6/2pkp3/8/8/1Q3BK1 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Coello-75 JT (Problemas), 2017

8/8/8/1R6/2pkp3/8/8/1Q3BK1

#2

4 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qb2#
  • Tries
    • 1.Kf2?
      • 1...Kc3
        • 2.Qb2#
      • 1...c3
        • 2.Qd1#
        • 2.Qb4#
      • 1...e3+!
    • 1.Qc2?
      • threat
        • 2.Qd2#
      • 1...Ke3
        • 2.Qf2#
      • 1...e3
        • 2.Qxc4#
      • 1...c3!
    • 1.Qa1+?
      • 1...c3
        • 2.Qa7#
      • 1...Ke3!
    • 1.Qc1?
      • threat
        • 2.Qd2#
      • 1...e3
        • 2.Qxc4#
      • 1...c3!
    • 1.Qb2+?
      • 1...Ke3
        • 2.Qf2#
      • 1...c3!
    • 1.Qb4?
      • threat
        • 2.Qd2#
      • 1...e3
        • 2.Qxc4#
      • 1...Ke3!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qd2#
      • 1...Kc3
        • 2.Qb2#
      • 1...Ke3
        • 2.Qf2#
      • 1...c3
        • 2.Qa7#
      • 1...e3
        • 2.Qxc4#

Anticipated by 11447(1938), 180065(1993)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(c);SBLOCK::QAR1(A),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • P(a);P_SPINP(a),SBLOCK::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(c);SBLOCK::QAR1(A),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • QAR2(A)
      • Vars
        • P(c);SBLOCK::QAR1(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);SBLOCK::QAB(A)
      • P(c);SBLOCK::QAR1(A),XP(a)
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