MESON Chess Problem Database

Problem Display
PID: 230351 (qr4n1/P7/8/N1kbB2R/PRp2N1Q/2p1pP2/K7/3B4 w - - 0 1)

Borisenko, Alexey Ivanovich

Zadachi i Etyudi, 2001

qr4n1/P7/8/N1kbB2R/PRp2N1Q/2p1pP2/K7/3B4

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Rxb5#
    • 1...Rc8
      • 2.Rb5#
    • 1...Rd8
      • 2.Rb5#
    • 1...Re8
      • 2.Rb5#
    • 1...Rf8
      • 2.Rb5#
    • 1...Bb7
      • 2.Rb5#
    • 1...Sh6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Qxc4#
        • 2.Qd4#
      • 1...Kxd5
        • 2.Qxc4#
      • 1...Rxb4
        • 2.Qd4#
      • 1...Qxd5!
    • 1.Bd6+?
      • 1...Kd4
        • 2.Sb3#
      • 1...Kxd6!
    • 1.Qd8?
      • threat
        • 2.Qd6#
      • 1...Kxb4
        • 2.Bd6#
      • 1...Rxd8
        • 2.Rb5#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Qc6!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Rxc4#
      • 1...Kxb4
        • 2.Sd3#
      • 1...Kd4
        • 2.Sb3#
      • 1...Rxb4
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(g);N_GUARD::R1(E),XR(g)
    • R(g);N_GUARD::R1(E)
    • B(e);S_CUTR(g)::R1(E)
    • S(h);N_GUARD::QAB(G)
    • S(h);N_GUARD::QAB(G),XS(h)
  • Tries
    • Try
      • S(F);XB(e)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT,XS(F)::QAB1(G),XP(c)
        • R(g);XR(E)::QAB1(G)
      • Refutation
        • Q(f);XS(F)
    • Try
      • B(I);CHECK,P_PINB(e)
      • Vars
        • K(d);N_SPINB(e),P_SPINP(c),S_FLIGHT::S(H)
      • Refutation
        • K(d);N_SPINB(e),S_FLIGHT,XB(I)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • K(d);S_FLIGHT,XR(E)::B(I)
        • R(g);N_GUARD,XQ(G)::R1(E)
        • R(g);N_GUARD::QAB1(G),XR(g)
      • Refutation
        • Q(f);
  • Actual
    • B(I);P_PINB(e)
    • Threat
      • R1(E),XP(c)
    • Vars
      • K(d);N_SPINB(e),S_FLIGHT,XR(E)::S(F)
      • K(d);N_SPINB(e),P_SPINP(c),S_FLIGHT::S(H)
      • R(g);SBLOCK,XR(E)::S(F)
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