MESON Chess Problem Database

Problem Display
PID: 207179 (4R3/B3N3/1NBRn3/1pn2pr1/3PP1p1/4k1pp/4P3/3K1Q2 w - - 0 1)

Chicco, Adriano

1st HM., Il Problema, 1932

4R3/B3N3/1NBRn3/1pn2pr1/3PP1p1/4k1pp/4P3/3K1Q2

#2

11 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6
      • 2.Sxf5#
    • 1...Rg7
      • 2.Sxf5#
    • 1...Rg8
      • 2.Sxf5#
    • 1...Sxe4
      • 2.Sbd5#
    • 1...Sxd4
      • 2.Sed5#
    • 1...Sf4
      • 2.Qg1#
    • 1...b4
      • 2.Sc4#
    • 1...f4
      • 2.Qg1#
  • Tries
    • 1.Sed5+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...Kxd4!
    • 1.Qg2?
      • threat
        • 2.Qxg3#
      • 1...Kf4
        • 2.Sbd5#
        • 2.Sed5#
      • 1...Sxe4
        • 2.Sbd5#
      • 1...Sxd4
        • 2.Sbd5#
        • 2.Sed5#
      • 1...f4
        • 2.Qg1#
      • 1...hxg2!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qxg3#
      • 1...Kf4
        • 2.Qd2#
      • 1...Sxe4
        • 2.Sbd5#
      • 1...Sxd4
        • 2.Sed5#
      • 1...g2
        • 2.Qg3#
      • 1...f4
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(h);N_GUARD::S(J),XP(g)
    • S(f);SBLOCK,XP(E)::S(F)
    • S(i);SBLOCK,XP(D)::S(J)
    • S(i);SBLOCK::QAB(B)
    • P(e);N_GUARD::S(F)
    • P(g);SBLOCK::QAB(B)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(i),XP(E)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(B);
      • Threat
        • QAR2(B),XP(b)
      • Vars
        • S(f);XP(E)::S(F)
        • P(g);SBLOCK::QAB(B)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR2(B),XP(b)
    • Vars
      • K(a);S_FLIGHT::QAB(B)
      • S(f);SBLOCK,XP(E)::S(F)
      • S(i);SBLOCK,XP(D)::S(J)
      • P(b);::QAR2(B)
      • P(g);SBLOCK::QAB(B)
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