MESON Chess Problem Database

Problem Display
PID: 202992 (8/8/R4B2/2pK4/1k6/1n6/8/1Q6 w - - 0 1)

Abdullayev, Suleyman

ChessStar, 2017

8/8/R4B2/2pK4/1k6/1n6/8/1Q6

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kc6?
      • 1...Kc4
        • 2.Ra4#
      • 1...c4!
    • 1.Ra1?
      • 1...Kb5
        • 2.Qxb3#
      • 1...c4!
    • 1.Ra2?
      • 1...Kb5
        • 2.Qxb3#
      • 1...c4!
    • 1.Ra4+?
      • 1...Kb5
        • 2.Qxb3#
      • 1...Kxa4!
    • 1.Rb6+?
      • 1...Ka3
        • 2.Qxb3#
      • 1...Ka4
        • 2.Qa2#
      • 1...Ka5!
    • 1.Ra7?
      • 1...Kb5
        • 2.Qxb3#
      • 1...c4!
    • 1.Ra8?
      • 1...Kb5
        • 2.Qxb3#
      • 1...c4!
    • 1.Qc2?
      • threat
        • 2.Qc4#
      • 1...Kb5
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
      • 1...Sd2
        • 2.Qa4#
      • 1...Sa5!
    • 1.Qe4+?
      • 1...Kb5
        • 2.Qa4#
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
      • 1...Sd4!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Rb6#
        • 2.Qa4#
      • 1...Kb5
        • 2.Qa4#
      • 1...Sd4
        • 2.Qc4#
      • 1...Sa5
        • 2.Rb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);N_SPINS(a),P-FLIGHT::R(C)
      • Refutation
        • P(c);
    • Try
      • R(C);
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XS(a)
      • Refutation
        • P(c);
    • Try
      • R(C);
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XS(a)
      • Refutation
        • P(c);
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XS(a)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT,XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAR1(A),XS(a)
        • K(b);N_SPINS(a),P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
    • Try
      • R(C);
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XS(a)
      • Refutation
        • P(c);
    • Try
      • R(C);
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINS(a)
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • P(c);::QAR1(A),XP(c)
        • S(a);OGATE::QAR1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK,N_PINS(a)
      • Vars
        • P(c);P_SPINP(c)::QAR1(A),XP(c)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • Q(A);N_PINS(a)
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT::QAB1(A)
      • S(a);OGATE::QAR1(A)
      • S(a);::R(C)
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