MESON Chess Problem Database

Problem Display
PID: 162983 (2R2KQB/2nN4/rP1k2p1/nP2N1pR/1P2p2b/4Pb1B/8/8 w - - 0 1)

Fasano, Alessandro

Best Problems, 2012

2R2KQB/2nN4/rP1k2p1/nP2N1pR/1P2p2b/4Pb1B/8/8

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sc6
      • 2.Sc4#
    • 1...Sb7
      • 2.Sc4#
    • 1...Sxb5
      • 2.Qe6#
    • 1...Sd5
      • 2.Sf7#
      • 2.Qe6#
    • 1...Se6+
      • 2.Qxe6#
    • 1...Sa8
      • 2.Qe6#
    • 1...Se8
      • 2.Qe6#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Rd8#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Bg4
        • 2.Sxe4#
      • 1...Sc6
        • 2.Sb7#
        • 2.Sc4#
      • 1...Sb7
        • 2.Sxb7#
        • 2.Sc4#
      • 1...g4
        • 2.Sf7#
      • 1...Ra8!
    • 1.Bf6?
      • threat
        • 2.Be7#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Sc6
        • 2.Sc4#
      • 1...Sd5
        • 2.Sf7#
        • 2.Qe6#
      • 1...g4!
    • 1.Rd8?
      • threat
        • 2.Sc5#
        • 2.Sb8#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Ra8
        • 2.Sb8#
      • 1...Sc6
        • 2.Sc4#
      • 1...Sb7
        • 2.Sc4#
      • 1...g4
        • 2.Sf6#
      • 1...Bg4!
    • 1.Qd5+?
      • 1...Sxd5
        • 2.Sf7#
      • 1...Kxd5!
    • 1.Qxg6+?
      • 1...Se6+
        • 2.Qxe6#
      • 1...Kd5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sf7#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Kxe5
        • 2.Se8#
      • 1...Bg4
        • 2.Sxe4#
      • 1...g4
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(d);N_GUARD::S(E)
    • S(d);N_GUARD::S(E),XS(d)
    • S(i);N_GUARD,XP(D)::QAR1(K)
    • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
    • S(i);N_GUARD::QAR1(K)
  • Tries
    • Try
      • S(H);
      • Threat
        • R(I)
      • Vars
        • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
        • B(a);N_GUARD::S(H),XP(b)
        • P(e);::S(E)
      • Refutation
        • R(f);P_PINR(I)
    • Try
      • B(L);
      • Threat
        • B(L)
      • Vars
        • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
        • S(d);N_GUARD::S(E)
      • Refutation
        • P(e);
    • Try
      • R(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
        • R(f);P_PINR(I)::R(I)+S(H)
        • S(d);N_GUARD::S(E)
        • P(e);::R(I)+S(H)
      • Refutation
        • B(a);
    • Try
      • Q(K);CHECK
      • Vars
        • S(i);SBLOCK,XQ(K)::S(E)
      • Refutation
        • K(g);P-FLIGHT,XQ(K)
    • Try
      • Q(K);CHECK,XP(h)
      • Vars
        • S(i);CHECK,N_GUARD,P_SPINS(i)::QAR1(K),XS(i)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • S(H);
    • Threat
      • S(E)
    • Vars
      • S(i);CHECK,N_GUARD::QAR1(K),XS(i)
      • K(g);P_SPINP(e),S_FLIGHT,XS(E)::B(L)+S(H)
      • B(a);N_GUARD::S(H),XP(b)
      • P(e);::R(I)
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