MESON Chess Problem Database

Problem Display
PID: 242353 (1qn5/Rb6/1p1k4/4p2p/1N1PP2B/3Pp2B/6K1/2Q5 w - - 0 1)

Morra, Juan Carlos

Magyar Sakkelet, 1958

1qn5/Rb6/1p1k4/4p2p/1N1PP2B/3Pp2B/6K1/2Q5

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Rd7#
    • 1...Ba6
      • 2.Rd7#
      • 2.Qc6#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Ba8
      • 2.Rd7#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Rxb7?
      • threat
        • 2.Rd7#
        • 2.Qc6#
      • 1...exd4
        • 2.Bg3#
      • 1...Qa7
        • 2.Qc6#
        • 2.Qc7#
      • 1...Qc7
        • 2.Qxc7#
      • 1...Sa7
        • 2.Be7#
        • 2.Rd7#
      • 1...Se7
        • 2.Bxe7#
        • 2.Rd7#
      • 1...Qxb7!
  • Keys
    • 1.Sd5!
      • 1...Qxa7
        • 2.Qc7#
      • 1...Bxd5
        • 2.Rd7#
      • 1...Sxa7
        • 2.Be7#
      • 1...exd4
        • 2.Bg3#
      • 1...Qc7
        • 2.Qxc7#
      • 1...Qa8
        • 2.Qc7#
      • 1...Ba6
        • 2.Rd7#
      • 1...Bc6
        • 2.Qa3#
      • 1...Ba8
        • 2.Rd7#
      • 1...Se7
        • 2.Bxe7#
      • 1...e2
        • 2.Qh6#
      • 1...b5
        • 2.Qc5#

This is a version of 242351

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE::R1(I)
    • B(f);N_GUARD::QAR1(A),XB(f)
    • P(d);N_GUARD::QAB1(A)
  • Tries
    • Try
      • R(I);N_SPINP(G),XB(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATEB,XP(F)::B(H)
        • Q(g);N_GUARD::QAB1(A),XQ(g)
      • Refutation
        • Q(g);P_PINP(G),XR(I)
  • Actual
    • S(E);N_SPINP(G)
    • Vars
      • Q(g);N_GUARD,XR(I)::QAB1(A)
      • B(f);OGATE,P_PINP(G),XS(E)::R1(I)
      • S(h);N_GUARD,XR(I)::B(H)
      • P(b);OGATEB,XP(F)::B(H)
      • Q(g);N_GUARD::QAB1(A),XQ(g)
      • Q(g);N_GUARD::QAB1(A)
      • B(f);OGATE::R1(I)
      • B(f);SBLOCK::QAB(A)
      • S(h);N_GUARD::B(H),XS(h)
      • P(a);OGATE::QAR(A)
      • P(d);N_GUARD::QAB1(A)
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