MESON Chess Problem Database

Problem Display
PID: 263460 (1bN4n/1pp1R1p1/6p1/rp1kN3/3Pp1K1/B6p/3R4/5Q2 w - - 0 1)

Abrosimov, Viktor Yakovlevich

Zarubin, Eduard

Zadachi i Etyudi, 2009

1bN4n/1pp1R1p1/6p1/rp1kN3/3Pp1K1/B6p/3R4/5Q2

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.Qxf7#
    • 1...e3
      • 2.Qh1#
      • 2.Qf3#
    • 1...b4
      • 2.Qc4#
    • 1...c5
      • 2.dxc5#
    • 1...c6
      • 2.Sb6#
  • Tries
    • 1.Qxb5+?
      • 1...c5
        • 2.Qc4#
        • 2.Qxb7#
        • 2.dxc5#
      • 1...Rxb5!
    • 1.Qc1?
      • threat
        • 2.Qc5#
      • 1...e3
        • 2.Qh1#
      • 1...b4
        • 2.Qc4#
      • 1...b6
        • 2.Qc6#
      • 1...c5
        • 2.Qxc5#
        • 2.dxc5#
      • 1...Ba7!
    • 1.Qf8?
      • threat
        • 2.Qd8#
      • 1...e3
        • 2.Qf3#
      • 1...Sf7
        • 2.Qxf7#
      • 1...c5
        • 2.dxc5#
      • 1...c6
        • 2.Sb6#
      • 1...Ra6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sb4#
      • 1...Kxc6
        • 2.d5#
      • 1...bxc6
        • 2.Re5#
      • 1...Ra4
        • 2.Qxb5#
      • 1...b4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(k);N_GUARD::QAB(A),XS(k)
    • P(d);N_GUARD::QAB1(A)
    • P(h);OGATE::R(B)+P(D),XP(h)
    • P(h);N_GUARD::S(H)
  • Tries
    • Try
      • Q(A);CHECK,XP(d)
      • Refutation
        • R(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(b);OGATEB::QAB(A)
        • P(d);N_GUARD::QAB1(A)
        • P(g);N_GUARD::QAB1(A)
      • Refutation
        • B(j);
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(b);OGATEB::QAB(A)
        • S(k);N_GUARD::QAB(A),XS(k)
        • P(h);OGATE::R(B)+P(D),XP(h)
        • P(h);N_GUARD::S(H)
      • Refutation
        • R(c);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(e);OGATE,S_FLIGHT,XS(F)::P(D)
      • P(g);SBLOCK,XS(F)::R1(G)
      • R(c);N_GUARD::QAR2(A),XP(d)
      • P(d);::S(F),XP(d)
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