MESON Chess Problem Database

Problem Display
PID: 205066 (2K3bn/2pP4/3b3R/nB1k1p2/3B4/5pP1/pNN5/4Q3 w - - 0 1)

Smirnov, Nikolai A

Zadachi i Etyudi, 1998

2K3bn/2pP4/3b3R/nB1k1p2/3B4/5pP1/pNN5/4Q3

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qe5#
    • 1...Bb4
      • 2.Qe5#
    • 1...Bc5
      • 2.Qe5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Be7
      • 2.Qe5#
    • 1...Bf8
      • 2.Qe5#
    • 1...Be6
      • 2.Qxe6#
    • 1...Bh7
      • 2.Qe6#
    • 1...Sc6
      • 2.Bc4#
    • 1...Sf7
      • 2.Qe6#
    • 1...f2
      • 2.Qh1#
  • Tries
    • 1.Sb4+?
      • 1...Bxb4
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Bc4+?
      • 1...Kc6
        • 2.Sb4#
        • 2.d8S#
      • 1...Sxc4!
    • 1.Rxd6+?
      • 1...Kxd6
        • 2.Qe5#
        • 2.d8Q#
        • 2.d8R#
      • 1...cxd6!
    • 1.Qe3?
      • threat
        • 2.Qxf3#
      • 1...f2
        • 2.Qf3#
      • 1...Sg6!
    • 1.d8Q?
      • threat
        • 2.Qe5#
      • 1...Be6+
        • 2.Qxe6#
      • 1...Sc6
        • 2.Bc4#
      • 1...Sg6
        • 2.Qxg8#
      • 1...Sf7
        • 2.Qe6#
      • 1...Sc4!
  • Keys
    • 1.Be2!
      • threat
        • 2.Bxf3#
      • 1...Ke4
        • 2.Bc4#
      • 1...Kc6
        • 2.Sb4#
      • 1...fxe2
        • 2.Qh1#
      • 1...f2
        • 2.Bf3#
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • B(f);N_GUARD::QAR1(A)
    • B(f);N_GUARD::QAR1(A),XB(f)
    • B(h);N_GUARD,P_PINP(H)::QAB1(A),XB(h)
    • B(h);N_GUARD::QAB1(A)
    • S(c);N_GUARD,SBLOCK::B(F)
    • S(i);S_CUTB(h)::QAB1(A)
    • P(b);OGATEB::QAB(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • B(f);XS(C)::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT,XB(E)
    • Try
      • B(F);CHECK
      • Refutation
        • S(c);XB(F)
    • Try
      • R(G);CHECK,XB(f)
      • Refutation
        • P(g);XR(G)
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(b)
      • Vars
        • P(b);::QAB(A)
      • Refutation
        • S(i);
    • Try
      • P(H);P_PINB(f)
      • Threat
        • QAR1(A)
      • Vars
        • B(h);CHECK,N_GUARD::QAB1(A),XB(h)
        • S(c);N_GUARD,SBLOCK::B(F)
        • S(i);N_GUARD::QAB(H),XB(h)
        • S(i);S_CUTB(h)::QAB1(A)
      • Refutation
        • S(c);
  • Actual
    • B(F);
    • Threat
      • B(F),XP(b)
    • Vars
      • K(d);S_FLIGHT::QAR(A)+B(F)
      • K(d);P_SPINB(f),S_FLIGHT::S(C)
      • P(b);OGATEB,XB(F)::QAB(A)
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