MESON Chess Problem Database

Problem Display
PID: 232889 (Q3N3/4pr2/4pB2/1K2nk1B/2p4P/4P3/5N2/1b6 w - - 0 1)

Morra, Juan Carlos

Il Due Mosse, 1959

Q3N3/4pr2/4pB2/1K2nk1B/2p4P/4P3/5N2/1b6

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf6
      • 2.Sg7#
    • 1...Ba2
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sg4
      • 2.Qf3#
    • 1...Sg6
      • 2.Bg4#
    • 1...Sd7
      • 2.Qf3#
    • 1...exf6
      • 2.Sd6#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sg3#
      • 1...Rg7
        • 2.Sxg7#
      • 1...Bxe4!
    • 1.Qg2?
      • threat
        • 2.Qg5#
      • 1...exf6
        • 2.Sd6#
      • 1...Sf3
        • 2.Bg6#
        • 2.Qxf3#
        • 2.Qh3#
        • 2.Qg4#
        • 2.Qg6#
      • 1...Sg4
        • 2.Qf3#
        • 2.Qxg4#
      • 1...Rg7!
    • 1.Qd5?
      • threat
        • 2.Qxe5#
      • 1...Rxf6
        • 2.Sg7#
      • 1...exf6
        • 2.Sd6#
      • 1...exd5!
    • 1.e4+?
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Kf4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qxe5#
      • 1...Rxf6
        • 2.Sg7#
      • 1...exf6
        • 2.Sd6#
      • 1...Sd3
        • 2.e4#
      • 1...Sf3
        • 2.Qf4#
      • 1...Sg4
        • 2.Qf4#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sg6
        • 2.Bg4#
      • 1...Sd7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD,SBLOCK,XB(F)::S(H)
    • B(a);N_GUARD::QAB1(G)
    • B(a);N_GUARD::QAB1(G),XB(a)
    • S(c);S_CUTB(a)::QAB1(G)
    • S(c);N_GUARD::QAR2(G),XS(c)
    • S(c);N_GUARD::QAR2(G)
    • S(c);N_GUARD,SBLOCK::B(E)
    • P(f);N_GUARD,SBLOCK,XB(F)::S(H)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • R(g);N_GUARD::S(H),XR(g)
      • Refutation
        • B(a);XS(A)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(f);N_GUARD,SBLOCK,XB(F)::S(H)
      • Refutation
        • R(g);
    • Try
      • Q(G);P_PINS(c)
      • Threat
        • QAR1(G),XS(c)
      • Vars
        • R(g);N_GUARD,SBLOCK,XB(F)::S(H)
        • P(f);N_GUARD,SBLOCK,XB(F)::S(H)
      • Refutation
        • P(e);N_SPINS(c),XQ(G)
    • Try
      • P(B);CHECK
      • Vars
        • B(a);OGATE,XP(B)::QAB1(G),XB(a)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAR1(G),XS(c)
    • Vars
      • R(g);N_GUARD,SBLOCK,XB(F)::S(H)
      • P(f);N_GUARD,SBLOCK,XB(F)::S(H)
      • S(c);S_CUTB(a)::P(B)
      • S(c);OGATE::QAR1(G)
      • S(c);N_GUARD,SBLOCK::B(E)
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