MESON Chess Problem Database

Problem Display
PID: 179204 (8/1B2p3/7Q/r3k3/3p4/2R3P1/1BK5/8 w - - 0 1)

Syzonenko, Viktor N

Phenix, 2015

8/1B2p3/7Q/r3k3/3p4/2R3P1/1BK5/8

#2

6 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rc5#
    • 1...Ra2
      • 2.Rc5#
    • 1...Ra3
      • 2.Rc5#
    • 1...Ra4
      • 2.Rc5#
    • 1...Rc5
      • 2.Rxc5#
    • 1...Ra6
      • 2.Rc5#
    • 1...Ra7
      • 2.Rc5#
    • 1...Ra8
      • 2.Rc5#
    • 1...e6
      • 2.Qf4#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Re3#
      • 1...d3+
        • 2.Rxd3#
      • 1...dxc3
        • 2.Bxc3#
      • 1...Ra3
        • 2.Rc5#
      • 1...Rc5
        • 2.Rxc5#
      • 1...e6!
    • 1.g4?
      • threat
        • 2.Re3#
      • 1...d3+
        • 2.Rxd3#
      • 1...dxc3
        • 2.Bxc3#
      • 1...Ra3
        • 2.Rc5#
      • 1...Rc5
        • 2.Rxc5#
      • 1...e6!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Qe6#
      • 1...Rc5+
        • 2.Rxc5#
      • 1...Ke4
        • 2.Rc5#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kf5
        • 2.Qf4#
      • 1...e6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::R(C)
    • R(b);N_GUARD,P_PINB(A)::R(C)
    • R(b);N_GUARD,P_PINR(C)::R(C),XR(b)
    • P(d);SBLOCK::QAB1(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • R(C)
      • Vars
        • P(a);CHECK,OGATEB::B(A)+R(C),XP(a)
        • P(a);OGATE,P_SPINP(a),XR(C)::B(A),XP(a)
        • R(b);N_GUARD::R(C)
        • R(b);N_GUARD,P_PINR(C)::R(C),XR(b)
      • Refutation
        • P(d);
    • Try
      • P(D);
      • Threat
        • R(C)
      • Vars
        • P(a);CHECK,OGATEB::B(A)+R(C),XP(a)
        • P(a);OGATE,P_SPINP(a),XR(C)::B(A),XP(a)
        • R(b);N_GUARD::R(C)
        • R(b);N_GUARD,P_PINR(C)::R(C),XR(b)
      • Refutation
        • P(d);
  • Actual
    • R(C);P_PINP(a)
    • Threat
      • QAR1(E)
    • Vars
      • R(b);CHECK,N_GUARD::R(C),XR(b)
      • K(c);N_SPINP(a),P-FLIGHT::B(F)+R(C)
      • K(c);N_SPINP(a),P-FLIGHT::QAB1(E)
      • K(c);N_SPINP(a),P-FLIGHT::QAR1(E)
      • P(d);::QAR1(E),XP(d)
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