MESON Chess Problem Database

Problem Display
PID: 152502 (8/3p4/2bR4/1B3QK1/1Np3P1/B1Pr4/3pRP2/3k2N1 w - - 0 1)

Zalkind, Lazar Borissovich

Good Companions (December), 1915

8/3p4/2bR4/1B3QK1/1Np3P1/B1Pr4/3pRP2/3k2N1

#2

11 + 6

2658 Good Companions (Solving Ty.) 1915

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc3
      • 2.Rdxd2#
    • 1...Re3
      • 2.Rdxd2#
      • 2.Qb1#
      • 2.Qc2#
    • 1...Rf3
      • 2.Rdxd2#
      • 2.Qb1#
      • 2.Qc2#
    • 1...Rg3
      • 2.Rdxd2#
      • 2.Qb1#
      • 2.Qc2#
    • 1...Rh3
      • 2.Rdxd2#
      • 2.Qb1#
      • 2.Qc2#
    • 1...Rd4
      • 2.Qb1#
      • 2.Qc2#
    • 1...Rxd6
      • 2.Qb1#
      • 2.Qc2#
    • 1...Bh1
      • 2.Ba4#
    • 1...Bg2
      • 2.Ba4#
    • 1...Bf3
      • 2.Ba4#
    • 1...Be4
      • 2.Ba4#
    • 1...Bd5
      • 2.Ba4#
    • 1...Bb7
      • 2.Ba4#
    • 1...Ba8
      • 2.Ba4#
  • Tries
    • 1.Sxc6?
      • threat
        • 2.Ba4#
      • 1...Rxc3
        • 2.Rdxd2#
      • 1...Kc2!
    • 1.Bxc6?
      • threat
        • 2.Ba4#
      • 1...Rxc3
        • 2.Rdxd2#
      • 1...dxc6!
    • 1.Qxd3?
      • threat
        • 2.Qb1#
        • 2.Qc2#
        • 2.Qxd2#
      • 1...Be4
        • 2.Ba4#
        • 2.Qxd2#
      • 1...cxd3!
  • Keys
    • 1.Qf3!
      • 1...Rd5+
        • 2.Re5#
      • 1...Rxc3
        • 2.Rdxd2#
      • 1...Rxf3
        • 2.Rdxd2#
      • 1...Rxd6
        • 2.Re4#
      • 1...Bxf3
        • 2.Ba4#
      • 1...Bxb5
        • 2.Re3#
      • 1...Re3
        • 2.Rdxd2#
      • 1...Rd4
        • 2.Re4#
      • 1...Be4
        • 2.Ba4#
      • 1...Bd5
        • 2.Ba4#
      • 1...Bb7
        • 2.Ba4#
      • 1...Ba8
        • 2.Ba4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(c);OGATE,P_SPINP(b),XP(E)::R1(K),XP(b)
    • B(e);N_GUARD::B(H)
  • Tries
    • Try
      • S(F);XB(e)
      • Threat
        • B(H)
      • Vars
        • R(c);OGATE,P_SPINP(b),XP(E)::R1(K),XP(b)
      • Refutation
        • K(a);P_SPINP(b),P_SPINR(c),S_FLIGHT
    • Try
      • B(H);XB(e)
      • Threat
        • B(H)
      • Vars
        • R(c);OGATE,P_SPINP(b),XP(E)::R1(K),XP(b)
      • Refutation
        • P(f);XB(H)
    • Try
      • Q(I);P_PINP(b),XR(c)
      • Threat
        • DUALS(3)
      • Refutation
        • P(d);N_SPINP(b),XQ(I)
  • Actual
    • Q(I);
    • Vars
      • R(c);CHECK,N_GUARD,S_CUTB(e)::QAB(I)+R(B)
      • R(c);OGATE,P_SPINP(b),XP(E)::R1(K),XP(b)
      • R(c);OGATE,P_SPINP(b),XQ(I)::R1(K),XP(b)
      • R(c);N_GUARD,XR(K)::QAB(I)+R(B)
      • B(e);N_GUARD,XQ(I)::B(H)
      • B(e);N_GUARD,XB(H)::QAB(I)+R(B)
      • R(c);OGATE,P_SPINP(b)::R1(K),XP(b)
      • R(c);N_GUARD::QAB(I)+R(B)
      • B(e);N_GUARD::B(H)
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