MESON Chess Problem Database

Problem Display
PID: 85108 (Q7/R3p2N/1p1pk1Pn/4Brr1/6Pn/3N1P2/8/7K w - - 0 1)

Makaronets, Leonid

3rd HM., Hlas l'udu, 1989

(First published on Thu Oct 12 1989)

Q7/R3p2N/1p1pk1Pn/4Brr1/6Pn/3N1P2/8/7K

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3
      • 2.Sxg5#
    • 1...Rf4
      • 2.Sxg5#
    • 1...Rxe5
      • 2.Sf4#
    • 1...Rf6
      • 2.Sxg5#
    • 1...Rf7
      • 2.Sxg5#
    • 1...Rf8
      • 2.Sxg5#
      • 2.Sxf8#
    • 1...Sf7
      • 2.Sf8#
    • 1...dxe5
      • 2.Qc6#
    • 1...d5
      • 2.Qc6#
      • 2.Qc8#
  • Tries
    • 1.Sf4+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Rxf4!
    • 1.Bf6?
      • threat
        • 2.Rxe7#
      • 1...Rxf6
        • 2.Sxg5#
      • 1...exf6
        • 2.Sf8#
      • 1...d5
        • 2.Qc6#
      • 1...Sg8
        • 2.Qxg8#
      • 1...Sxg6!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qd5#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Rxe5
        • 2.Qc8#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD,XP(C)::S(H),XR(c)
    • R(b);N_GUARD::S(H),XR(c)
    • R(b);N_GUARD,SBLOCK,XB(E)::S(B)
    • S(g);S_CUTR(b)::S(H)
    • P(e);OGATEB,XB(E)::QAR2(I)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(f);P-FLIGHT,XB(E)::QAR1(I)
      • Refutation
        • R(b);XS(B)
    • Try
      • B(E);
      • Threat
        • R1(G),XP(h)
      • Vars
        • R(b);N_GUARD,SBLOCK,XB(E)::S(H),XR(c)
        • P(h);SBLOCK,XB(E)::S(H)
        • P(e);OGATEB::QAR2(I)
        • S(g);N_GUARD::QAB(I),XS(g)
      • Refutation
        • S(a);XP(F)
  • Actual
    • S(B);
    • Threat
      • QAB1(I)
    • Vars
      • K(f);OGATEB,P-FLIGHT,XB(E)::QAR1(I)
      • R(b);SBLOCK,XB(E)::QAB(I)
      • P(e);::QAB1(I),XP(e)
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