MESON Chess Problem Database

Problem Display
PID: 237291 (8/1q6/R1NQ4/8/P1k4r/1pb5/BP4Rp/7K w - - 0 1)

Lipton, Michael

4th Comm., Petite MT (Problemas), 2015

8/1q6/R1NQ4/8/P1k4r/1pb5/BP4Rp/7K

#2

8 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Rxc6#
    • 1...Rd4
      • 2.Se5#
    • 1...Be1
      • 2.Se5#
    • 1...Bd2
      • 2.Se5#
    • 1...Bb4
      • 2.Se5#
    • 1...Ba5
      • 2.Sxa5#
      • 2.Se5#
    • 1...Be5
      • 2.Sa5#
      • 2.Sxe5#
    • 1...Bf6
      • 2.Sa5#
    • 1...Bg7
      • 2.Sa5#
    • 1...Bh8
      • 2.Sa5#
  • Tries
    • 1.Rg4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Rxg4!
    • 1.Qc5+?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kxc5!
    • 1.Qe6+?
      • 1...Kd3
        • 2.Bb1#
        • 2.Qe2#
      • 1...Kc5!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Rxc3#
      • 1...Qxc6+
        • 2.Rxc6#
      • 1...Qb4
        • 2.Se5#
      • 1...Qg7
        • 2.Sa5#
      • 1...Rh3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(f);OGATE,P_PINR(D),XS(G)::R(F),XQ(f)
    • R(e);S_CUTB(c)::S(G)
    • B(c);N_GUARD::S(G)
  • Tries
    • Try
      • R(D);CHECK,P_SPINS(G)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(H),XB(c)
      • Refutation
        • R(e);XR(D)
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);N_SPINP(b),S_FLIGHT::B(B)
      • Refutation
        • K(d);N_SPINP(b),P-FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(d);N_SPINP(b),P-FLIGHT
  • Actual
    • R(D);P_PINB(c),P_SPINS(G)
    • Threat
      • R1(D),XB(c)
    • Vars
      • Q(f);CHECK,OGATE,XS(G)::R(F),XQ(f)
      • Q(f);N_PINS(G)::S(G)
      • R(e);N_GUARD::QAR1(H)
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