MESON Chess Problem Database

Problem Display
PID: 64966 (8/2K5/8/3kpR2/3pR3/8/8/4Q3 w - - 0 1)

Bagretsov, Yuri

Source?, 1990

8/2K5/8/3kpR2/3pR3/8/8/4Q3

#2

4 + 3

785 Het Belgisch Schaakbord (L'Echiquier Belge) 2006
5503 ISC 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Rexe5#
    • 1...d3
      • 2.Rfxe5#
  • Tries
    • 1.Rxd4+?
      • 1...Kc5
        • 2.Qb4#
        • 2.Qxe5#
      • 1...Ke6
        • 2.Qxe5#
      • 1...Kxd4!
    • 1.Qb4?
      • threat
        • 2.Rexe5#
        • 2.Rfxe5#
      • 1...Ke6
        • 2.Rexe5#
      • 1...Kxe4!
    • 1.Qc1?
      • threat
        • 2.Rexe5#
        • 2.Rfxe5#
        • 2.Qc6#
      • 1...Ke6
        • 2.Rexe5#
      • 1...d3
        • 2.Rfxe5#
        • 2.Qc4#
        • 2.Qc6#
      • 1...Kxe4!
    • 1.Qf1?
      • threat
        • 2.Rexe5#
        • 2.Rfxe5#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Ke6
        • 2.Rexe5#
        • 2.Rfxe5#
      • 1...d3
        • 2.Rfxe5#
      • 1...Kc5!
    • 1.Qe2?
      • threat
        • 2.Rexe5#
        • 2.Rfxe5#
      • 1...Ke6
        • 2.Rexe5#
      • 1...d3
        • 2.Rfxe5#
      • 1...Kc5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Rexe5#
        • 2.Rfxe5#
        • 2.Qc6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Ke6
        • 2.Rexe5#
      • 1...dxc3
        • 2.Rfxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::R1(B),XP(c)
    • P(a);::R1(C),XP(c)
  • Tries
    • Try
      • R(B);CHECK,XP(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT,XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::R1(B),XP(c)
      • Refutation
        • K(b);N_SPINP(c),P_SPINP(a),S_FLIGHT,XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • K(b);S_FLIGHT::R1(B),XP(c)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT,XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(B)::QAB1(A)
        • P(a);::R1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::R1(B),XP(c)
        • P(a);::R1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(b);N_SPINP(c),OGATEB,S_FLIGHT,XR(B)::QAB1(A)
      • K(b);S_FLIGHT::R1(B),XP(c)
      • P(a);XQ(A)::R1(C),XP(c)
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