MESON Chess Problem Database

Problem Display
PID: 234474 (n5K1/4Qp2/4N2B/3P1Pnp/3Pk3/3pN1R1/q7/bB2Rr2 w - - 0 1)

Makaronets, Leonid

3rd Prize, Revista Romana de Sah, 1980

n5K1/4Qp2/4N2B/3P1Pnp/3Pk3/3pN1R1/q7/bB2Rr2

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sxf1+?
      • 1...Kxd5
        • 2.Qc5#
      • 1...Kxf5
        • 2.Rxg5#
        • 2.Qxg5#
      • 1...Qe2!
    • 1.Sc2+?
      • 1...Kxd5
        • 2.Qc5#
      • 1...Kxf5
        • 2.Rxg5#
        • 2.Qxg5#
      • 1...Rxe1!
    • 1.Sc5+?
      • 1...Kf4
        • 2.Qxg5#
        • 2.Qd6#
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Sxg5+?
      • 1...Kf4
        • 2.Se4#
        • 2.Qd6#
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Sc7+?
      • 1...Kxd4
        • 2.Sb5#
      • 1...Kf4
        • 2.Qe5#
      • 1...Se6!
    • 1.Qd6?
      • threat
        • 2.Qe5#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Rxf5
        • 2.Sc2#
      • 1...Bxd4
        • 2.Sxg5#
      • 1...Sf3
        • 2.Qf4#
      • 1...f6!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qe5#
      • 1...Qxd5
        • 2.Sxf1#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Sf3
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK,XR(b)
      • Vars
        • K(e);N_SPINP(d),S_FLIGHT,XP(F)::QAR1(J)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • S(C);CHECK,N_PINP(d)
      • Vars
        • K(e);S_FLIGHT,XP(F)::QAR1(J)
      • Refutation
        • R(b);XR(B)
    • Try
      • S(H);CHECK
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,XP(E)
    • Try
      • S(H);CHECK,XS(f)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,XP(E)
    • Try
      • S(H);CHECK
      • Vars
        • K(e);N_SPINP(d),P-FLIGHT,XP(E)::S(H)
        • K(e);N_SPINP(d),P-FLIGHT,P_SPINS(f)::QAB1(J)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • Q(c);OGATE,XP(F)::QAB1(J),XQ(c)
        • R(b);N_GUARD,SBLOCK,XP(G)::R(B)+S(C)
        • B(a);SBLOCK,XP(E)::S(H),XS(f)
        • S(f);S_CUTR(b)::QAR1(J)
      • Refutation
        • P(h);
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • Q(c);N_GUARD,SBLOCK,XP(F)::R(B)+S(C),XR(b)
      • R(b);OGATE,XP(G)::QAB1(J),XR(b)
      • B(a);OGATE,XP(E)::QAR1(J),XB(a)
      • S(f);::S(H)
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