MESON Chess Problem Database

Problem Display
PID: 161032 (8/1R6/1Qp5/2pk1N2/5K2/8/8/8 w - - 0 1)

Rumyantsev, Sergei Yuryewitch

Vecherni Kharkov, 1982

8/1R6/1Qp5/2pk1N2/5K2/8/8/8

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb3#
    • 1...Ke6
      • 2.Qxc6#
  • Tries
    • 1.Rc7?
      • 1...Ke6
        • 2.Qxc6#
      • 1...c4
        • 2.Qxc6#
      • 1...Kc4!
    • 1.Rd7+?
      • 1...Ke6
        • 2.Qxc6#
      • 1...Kc4!
    • 1.Re7?
      • 1...c4
        • 2.Re5#
        • 2.Qd4#
      • 1...Kc4!
    • 1.Qxc5+?
      • 1...Ke6
        • 2.Qd6#
        • 2.Qe5#
        • 2.Qxc6#
      • 1...Kxc5!
    • 1.Qc7?
      • threat
        • 2.Qf7#
      • 1...Ke6
        • 2.Qe5#
        • 2.Qd6#
        • 2.Qxc6#
        • 2.Qf7#
      • 1...c4
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kc4!
    • 1.Qd8+?
      • 1...Ke6
        • 2.Sg7#
        • 2.Qd6#
      • 1...Kc4!
    • 1.Qb5?
      • 1...Ke6
        • 2.Qxc6#
      • 1...cxb5!
    • 1.Qa6?
      • 1...Ke6
        • 2.Qxc6#
      • 1...c4!
  • Keys
    • 1.Qb2!
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke6
        • 2.Qe5#
      • 1...c4
        • 2.Qe5#

FEATURES

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