MESON Chess Problem Database

Problem Display
PID: 142579 (B4Q1B/1Np5/4p3/3pP3/n1Pkp3/2pP4/2P1R1K1/n3N1b1 w - - 0 1)

Mochalkin, Oleksandr Viktorovich

4th Prize, Hlas l'udu, 1989

B4Q1B/1Np5/4p3/3pP3/n1Pkp3/2pP4/2P1R1K1/n3N1b1

#2

11 + 9

702 Phenix 1990

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
    • 1...exd3
      • 2.Qf4#
    • 1...e3
      • 2.Sf3#
      • 2.Qf4#
    • 1...dxc4
      • 2.Qd8#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sc6#
        • 2.Sxe6#
      • 1...dxc4
        • 2.Sxe6#
        • 2.Rxe4#
      • 1...Sc5
        • 2.Sc6#
      • 1...c6
        • 2.Sxc6#
        • 2.Sxe6#
      • 1...exd3!
    • 1.Qf2+?
      • 1...e3
        • 2.Sf3#
        • 2.Qh4#
        • 2.Qf4#
      • 1...Bxf2!
    • 1.Qf4?
      • threat
        • 2.Sf3#
      • 1...dxc4
        • 2.Qxe4#
      • 1...Sxc2!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sc6#
      • 1...exd3
        • 2.Sf3#
      • 1...dxc4
        • 2.Rxe4#
      • 1...c6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(d);N_GUARD::QAB1(J)
    • S(d);N_GUARD::QAB1(J),XS(d)
    • P(f);OGATEB,XP(E)::QAR2(J)
    • P(g);OGATEB,XP(F)::QAR(J)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::S(H)
      • Refutation
        • P(f);XP(E)
    • Try
      • Q(J);CHECK
      • Refutation
        • B(b);XQ(J)
    • Try
      • Q(J);P_PINP(f)
      • Threat
        • S(A)
      • Vars
        • P(g);N_GUARD,XP(F)::QAR1(J),XP(f)
      • Refutation
        • S(a);XP(B)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • P(f);N_GUARD,XP(E)::S(A)
      • P(g);N_GUARD,XP(F)::R1(C),XP(f)
      • P(i);::S(H),XP(i)
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Developed and maintained by Brian Stephenson.
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