MESON Chess Problem Database

Problem Display
PID: 263705 (3r3b/2P3BQ/1PK2n2/2pN4/2k1N3/P1nR1p2/P1BPr1q1/2R5 w - - 0 1)

Kopyl, Valery Volodimirovich

Zadachi i Etyudi, 2009

3r3b/2P3BQ/1PK2n2/2pN4/2k1N3/P1nR1p2/P1BPr1q1/2R5

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Se3#
    • 1...Rf2
      • 2.Se3#
    • 1...Re3
      • 2.Sxe3#
    • 1...Rd6+
      • 2.Sxd6#
    • 1...Ra8
      • 2.Sd6#
    • 1...Rb8
      • 2.Sd6#
    • 1...Rc8
      • 2.Sd6#
    • 1...Re8
      • 2.Sd6#
    • 1...Rf8
      • 2.Sd6#
    • 1...Rg8
      • 2.Sd6#
    • 1...Sb1
      • 2.Bxb1#
    • 1...Sg4
      • 2.Rxc3#
    • 1...Sh5
      • 2.Rxc3#
    • 1...Sd7
      • 2.Sd6#
      • 2.Rxc3#
    • 1...Sxh7
      • 2.Rxc3#
    • 1...Se8
      • 2.Rxc3#
    • 1...Sg8
      • 2.Rxc3#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Bb3#
      • 1...Rd6+
        • 2.Sxd6#
      • 1...Rxd3!
    • 1.Ba4?
      • threat
        • 2.Bb5#
        • 2.Rcxc3#
      • 1...Rd6+
        • 2.Sxd6#
      • 1...Sxe4
        • 2.Bb5#
      • 1...Sxd5
        • 2.Bb5#
      • 1...Kxd3!
    • 1.Rd4+?
      • 1...cxd4
        • 2.d3#
      • 1...Kxd4!
    • 1.Qh4?
      • threat
        • 2.Sd6#
      • 1...Rd6+
        • 2.Sxd6#
      • 1...Rxe4
        • 2.Se3#
      • 1...Scxe4
        • 2.Bb1#
      • 1...Sfxe4
        • 2.Rxc3#
      • 1...Sg4
        • 2.Rxc3#
      • 1...Qg4!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Se3#
      • 1...Rd6+
        • 2.Sxd6#
      • 1...Rxd5
        • 2.Sd6#
      • 1...Rxg8
        • 2.Sd6#
      • 1...Scxd5
        • 2.Bb1#
      • 1...Sfxd5
        • 2.Rxc3#
      • 1...Sxg8
        • 2.Rxc3#
      • 1...Re3
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • R(a);N_GUARD,XP(D)::S(H)
    • R(a);N_GUARD::S(H)
    • R(a);N_GUARD::S(H),XR(a)
    • R(h);CHECK,N_GUARD::S(G),XR(h)
    • R(h);N_GUARD::S(G)
    • R(h);N_GUARD,P_PINP(K)::S(G)
    • S(c);OGATEB::R(A)+B(C),XS(c)
    • S(g);::R1(F),XS(c)
    • S(g);XQ(M)::R1(F),XS(c)
  • Tries
    • Try
      • S(H);
      • Threat
        • B(C)
      • Vars
        • R(h);CHECK,N_GUARD::S(G),XR(h)
      • Refutation
        • R(h);XR(F)
    • Try
      • B(C);P_PINS(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);CHECK,N_GUARD::S(G),XR(h)
        • S(g);XS(G)::B(C)
        • S(g);XS(H)::B(C)
      • Refutation
        • K(e);N_SPINS(c),S_FLIGHT,XR(F)
    • Try
      • R(F);CHECK
      • Vars
        • P(f);SBLOCK,XR(F)::P(D)
      • Refutation
        • K(e);P-FLIGHT,P_SPINS(g),XR(F)
    • Try
      • Q(M);
      • Threat
        • QAR(M)+S(G),DCHECK
      • Vars
        • R(h);CHECK::QAR(M)+S(G),DCHECK,XR(h)
        • R(a);N_GUARD,P_SPINR(a),XS(G)::S(H)
        • S(c);OGATEB,P_SPINS(c),XS(G)::R(A)+B(C)
        • S(g);P_SPINS(g),XS(G)::R1(F),XS(c)
        • S(g);::R1(F),XS(c)
      • Refutation
        • Q(b);
  • Actual
    • Q(M);
    • Threat
      • QAB(M)+S(H),DCHECK
    • Vars
      • R(h);CHECK,N_GUARD::S(G),XR(h)
      • R(h);N_GUARD,P_SPINR(h),XS(H)::S(G)
      • R(h);N_GUARD,XQ(M)::S(G)
      • S(c);OGATEB,P_SPINS(c),XS(H)::R(A)+B(C)
      • S(g);P_SPINS(g),XS(H)::R1(F),XS(c)
      • S(g);XQ(M)::R1(F),XS(c)
      • R(a);::QAB(M)+S(H),DCHECK,XR(a)
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