MESON Chess Problem Database

Problem Display
PID: 246024 (8/1R1Q4/r1p5/k7/2KP4/8/8/8 w - - 0 1)

Svitek, Miroslav

Kudesnik, 2010

8/1R1Q4/r1p5/k7/2KP4/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qb5#
  • Tries
    • 1.Rb1?
      • 1...Ka4
        • 2.Ra1#
      • 1...Rb6
        • 2.Ra1#
      • 1...Ra7
        • 2.Qxa7#
      • 1...c5
        • 2.Qb5#
      • 1...Ra8!
    • 1.Rb2?
      • 1...Ka4
        • 2.Ra2#
      • 1...Rb6
        • 2.Ra2#
      • 1...Ra7
        • 2.Qxa7#
      • 1...c5
        • 2.Qb5#
      • 1...Ra8!
    • 1.Rb5+?
      • 1...cxb5+
        • 2.Qxb5#
      • 1...Ka4!
    • 1.Qd6?
      • threat
        • 2.Qa3#
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Rb6
        • 2.Qa3#
      • 1...Ra7
        • 2.Qa3#
      • 1...Ra8
        • 2.Qa3#
      • 1...c5!
    • 1.Qc7+?
      • 1...Rb6
        • 2.Ra7#
      • 1...Ka4!
    • 1.Qe7?
      • threat
        • 2.Qa3#
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Rb6
        • 2.Qa3#
      • 1...Ra7
        • 2.Qa3#
      • 1...Ra8
        • 2.Qa3#
      • 1...c5!
    • 1.Qd8+?
      • 1...Rb6
        • 2.Ra7#
      • 1...Ka4!
  • Keys
    • 1.Ra7!
      • 1...Ka4
        • 2.Rxa6#
      • 1...Kb6
        • 2.Qc7#
      • 1...Rxa7
        • 2.Qxa7#
      • 1...c5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::QAR1(D)
  • Tries
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c)::R(C)
        • R(b);SBLOCK::R(C)
        • R(b);OGATEB::QAR2(D),XR(b)
        • P(c);OGATE::QAR1(D)
      • Refutation
        • R(b);
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c)::R(C)
        • R(b);SBLOCK::R(C)
        • R(b);OGATEB::QAR2(D),XR(b)
        • P(c);OGATE::QAR1(D)
      • Refutation
        • R(b);
    • Try
      • R(C);CHECK
      • Vars
        • P(c);CHECK,OGATE,XR(C)::QAR1(D),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • R(b);::QAR2(D)
      • Refutation
        • P(c);
    • Try
      • Q(D);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • R(b);::QAR2(D)
      • Refutation
        • P(c);
    • Try
      • Q(D);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(C);P_PINR(b)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(c)::R(C),XR(b)
      • K(a);N_SPINR(b),S_FLIGHT::QAB1(D)
      • R(b);N_SPINR(b),OGATE,XR(C)::QAR2(D),XR(b)
      • P(c);OGATE::QAR1(D)
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