MESON Chess Problem Database

Problem Display
PID: 51374 (8/P3p2K/4N2b/qp6/2B1k2N/1n4Q1/R4P2/1b2r3 w - - 0 1)

Morra, Juan Carlos

Manchester Guardian, 1958

8/P3p2K/4N2b/qp6/2B1k2N/1n4Q1/R4P2/1b2r3

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.a8Q#
      • 2.a8B#
    • 1...Qb4
      • 2.a8Q#
      • 2.a8B#
    • 1...Be3
      • 2.f3#
    • 1...Bf4
      • 2.Qxf4#
    • 1...Bg7
      • 2.Qf4#
    • 1...Bf8
      • 2.Qf4#
    • 1...Sd4
      • 2.Sc5#
  • Tries
    • 1.Re2+?
      • 1...Be3
        • 2.Qf4#
        • 2.Qxe3#
        • 2.f3#
      • 1...Rxe2!
    • 1.Qg4+?
      • 1...Bf4
        • 2.Qf5#
        • 2.Qxf4#
      • 1...Ke5+!
  • Keys
    • 1.f4!
      • threat
        • 2.Qf3#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Qc3
        • 2.a8Q#
        • 2.a8B#
      • 1...Rf1
        • 2.Re2#
      • 1...Re3
        • 2.Qg6#
      • 1...Sd2
        • 2.Qxe1#
      • 1...Sd4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD::P=Q
    • B(g);SBLOCK::P(B)
    • B(g);N_GUARD::QAR1(C),XB(g)
    • B(g);N_GUARD::QAR1(C)
    • S(c);N_GUARD,SBLOCK::S(F)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • R(b);XR(A)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(d);CHECK,P-FLIGHT
  • Actual
    • P(B);
    • Threat
      • QAB1(C)
    • Vars
      • B(g);OGATE,XP(B)::QAR1(C),XB(g)
      • Q(e);N_GUARD::P=Q
      • R(b);N_GUARD::R(A)
      • R(b);SBLOCK::QAB(C)
      • S(c);S_CUTQ(e)::QAR(C),XR(b)
      • S(c);N_GUARD,SBLOCK::S(F)
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Developed and maintained by Brian Stephenson.
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