MESON Chess Problem Database

Problem Display
PID: 81115 (1N6/2BPr2b/2P2qQr/p2kp1N1/4p2R/1P2P3/K1R5/5B1n w - - 0 1)

Guida, Marco

1st Prize, The Problemist, 2008

1N6/2BPr2b/2P2qQr/p2kp1N1/4p2R/1P2P3/K1R5/5B1n

#2

12 + 9

56 The Problemist 2009
4901 Best Problems 2010
145 StrateGems 2010
23 Die Schwalbe 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bg8
      • 2.Qxe4#
  • Tries
    • 1.Sa6?
      • threat
        • 2.Rc5#
      • 1...Qxc6
        • 2.Rd2#
      • 1...Qf2
        • 2.Bc4#
      • 1...Qd6!
    • 1.Bb6?
      • threat
        • 2.Rd2#
      • 1...Kd6
        • 2.Rd2#
      • 1...Qxf1
        • 2.Rc5#
      • 1...Qf2
        • 2.Bc4#
      • 1...Sf2!
    • 1.b4?
      • threat
        • 2.Bc4#
        • 2.Rd2#
        • 2.Rc5#
      • 1...Qxf1
        • 2.Rc5#
      • 1...Qxc6
        • 2.Rd2#
      • 1...Qf2
        • 2.Bc4#
      • 1...Qd6
        • 2.Bc4#
        • 2.Rd2#
      • 1...Sf2
        • 2.Bc4#
        • 2.Rc5#
      • 1...axb4!
    • 1.d8Q+?
      • 1...Qd6
        • 2.Qdxd6#
      • 1...Rd7!
    • 1.d8R+?
      • 1...Qd6
        • 2.Rxd6#
      • 1...Rd7!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Bc4#
      • 1...Ke6
        • 2.Bc4#
      • 1...Qxf1
        • 2.Rc5#
      • 1...Qxc6
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(i);N_GUARD::QAB1(I),XP(b)
  • Tries
    • Try
      • S(L);
      • Threat
        • R1(C)
      • Vars
        • Q(f);XP(H)::R(C)
        • Q(f);P_PINR(C)::B(A)
      • Refutation
        • Q(f);
    • Try
      • B(J);
      • Threat
        • R(C)
      • Vars
        • K(d);P-FLIGHT,P_SPINQ(f)::R(C)
        • Q(f);XB(A)::R1(C)
        • Q(f);P_PINR(C)::B(A)
      • Refutation
        • S(a);
    • Try
      • P(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(f);XB(A)::R1(C)
        • Q(f);XP(H)::R(C)
        • Q(f);P_PINR(C)::B(A)
      • Refutation
        • P(c);XP(D)
    • Try
      • P(K);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAR1(K),XQ(f)
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • P(K);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::R1(K),XQ(f)
      • Refutation
        • R(h);P_SPINR(h)
  • Actual
    • S(G);XP(b)
    • Threat
      • B(A)
    • Vars
      • K(d);P_SPINQ(f),S_FLIGHT::B(A)
      • Q(f);XB(A)::R1(C)
      • Q(f);XP(H)::R(C)
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