MESON Chess Problem Database

Problem Display
PID: 78141 (1b2r2q/7p/7Q/5k1N/7P/5N1K/B7/8 w - - 0 1)

Morra, Juan Carlos

The Tablet, 1957

(First published on Sat Nov 23 1957)

1b2r2q/7p/7Q/5k1N/7P/5N1K/B7/8

#2

6 + 5

15239 Valois Notebooks 2017
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qxh7#
    • 1...Qb2
      • 2.Qxh7#
    • 1...Qc3
      • 2.Qxh7#
    • 1...Qd4
      • 2.Qxh7#
    • 1...Qe5
      • 2.Qxh7#
    • 1...Qf8
      • 2.Qxh7#
    • 1...Re4
      • 2.Qg5#
    • 1...Re5
      • 2.Sg3#
    • 1...Re6
      • 2.Qxe6#
    • 1...Rc8
      • 2.Qe6#
    • 1...Rd8
      • 2.Qe6#
    • 1...Rf8
      • 2.Bb1#
      • 2.Qe6#
    • 1...Rg8
      • 2.Bb1#
      • 2.Qe6#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Be5
      • 2.Bb1#
    • 1...Ba7
      • 2.Sg3#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Qg5#
      • 1...Qf6
        • 2.Qxf6#
      • 1...Qg7
        • 2.Sxg7#
      • 1...Qg8
        • 2.Qf6#
      • 1...Rg8
        • 2.Qe6#
      • 1...Bf4!
    • 1.Qf4+?
      • 1...Kg6
        • 2.Bf7#
        • 2.Qg5#
      • 1...Bxf4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Qxe5
        • 2.Qxh7#
      • 1...Rxe5
        • 2.Sg3#
      • 1...Bxe5
        • 2.Bb1#

Anticipated by 18058(1953-1954)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • Q(e);N_GUARD::QAB(F),XP(b)
    • Q(e);N_GUARD,P_PINS(B)::QAB(F),XP(b)
    • R(d);SBLOCK::QAR1(F)
    • R(d);S_CUTB(c)::S(E)
    • R(d);N_GUARD::QAB1(F),XR(d)
    • R(d);N_GUARD::QAB1(F)
    • B(c);N_GUARD::S(E),XB(c)
    • B(c);S_CUTR(d)::B(A)
    • B(c);N_GUARD::S(E)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR1(F)
      • Vars
        • Q(e);N_GUARD::QAR1(F),XQ(e)
        • Q(e);N_GUARD::S(E),XQ(e)
        • Q(e);N_GUARD::QAR1(F)
        • R(d);N_GUARD::QAB1(F)
      • Refutation
        • B(c);
    • Try
      • Q(F);CHECK
      • Refutation
        • B(c);XQ(F)
  • Actual
    • S(B);
    • Threat
      • QAR1(F)
    • Vars
      • K(a);S_FLIGHT::QAR1(F)
      • K(a);P-FLIGHT,XS(B)::QAB1(F)
      • Q(e);N_GUARD,SBLOCK,XS(B)::QAB(F),XP(b)
      • R(d);SBLOCK,XS(B)::S(E)
      • B(c);SBLOCK,XS(B)::B(A)
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