MESON Chess Problem Database

Problem Display
PID: 134005 (4br1B/2rp4/n4p2/b5R1/2pkN3/4R3/2P3N1/5K2 w - - 0 1)

Morra, Juan Carlos

The Field, 1964

(First published on Thu Jan 2 1964)

4br1B/2rp4/n4p2/b5R1/2pkN3/4R3/2P3N1/5K2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Bxf6#
    • 1...Bb6
      • 2.c3#
    • 1...Bf7
      • 2.Bxf6#
    • 1...Sb4
      • 2.c3#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Se2#
        • 2.Sb5#
        • 2.Rd5#
      • 1...d5
        • 2.Rxd5#
      • 1...Rc5
        • 2.Se2#
        • 2.Rg4#
      • 1...Rb7
        • 2.Se2#
        • 2.Rd5#
      • 1...Bh5
        • 2.Sb5#
        • 2.Rd5#
      • 1...Bf7
        • 2.Se2#
        • 2.Sb5#
        • 2.Bxf6#
      • 1...Sb4
        • 2.Se2#
        • 2.Sb5#
      • 1...d6
        • 2.Se2#
        • 2.Rd5#
      • 1...Bxc3!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Rd5#
      • 1...Rxf6+
        • 2.Bxf6#
      • 1...c3
        • 2.Re4#
      • 1...d5
        • 2.Rxd5#
      • 1...Rc5
        • 2.Rg4#
      • 1...Bf7
        • 2.Sg8#
      • 1...Sb4
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(i);N_GUARD::B(G),XP(e)
    • B(c);N_GUARD::P(B)
    • B(h);S_CUTR(i)::B(G),XP(e)
    • S(d);S_CUTB(c)::P(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(3)
      • Vars
        • P(g);::R1(F),XP(g)
      • Refutation
        • B(c);XS(E)
  • Actual
    • S(E);P_SPINS(E),XP(e)
    • Threat
      • R1(F)
    • Vars
      • R(i);CHECK,OGATE,P_SPINR(i),XS(E)::B(G),XR(i)
      • P(a);SBLOCK::R1(D)
      • P(g);::R1(F),XP(g)
      • R(f);SBLOCK::R(F)
      • B(h);N_PINS(E)::B(G)+S(E)
      • S(d);S_CUTB(c)::P(B)
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