MESON Chess Problem Database

Problem Display
PID: 51527 (7K/4nB2/1p2R1p1/1RpkP3/7p/7r/2Q2B1b/3N1b2 w - - 0 1)

Morra, Juan Carlos

The Guardian, 1963

7K/4nB2/1p2R1p1/1RpkP3/7p/7r/2Q2B1b/3N1b2

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5+
      • 2.Rf6#
    • 1...Sc6
      • 2.Re7#
      • 2.Re8#
  • Tries
    • 1.Sc3+?
      • 1...Kc4
        • 2.Rxe7#
      • 1...Rxc3!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Qe4#
      • 1...Bxe5+
        • 2.Rf6#
      • 1...cxb4
        • 2.Rxe7#
      • 1...Rd3
        • 2.Qc4#
      • 1...Re3
        • 2.Sxe3#
      • 1...Bg2
        • 2.Qc4#
      • 1...Bd3
        • 2.Sc3#
      • 1...Bc4
        • 2.Qxc4#
      • 1...c4
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,SBLOCK,XP(E)::B(G)+R(F)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(f);N_SPINP(e),S_FLIGHT::B(G)+R(F),XS(i)
      • Refutation
        • R(c);XS(A)
  • Actual
    • R(D);N_PINP(e)
    • Threat
      • QAB1(B)
    • Vars
      • B(b);CHECK,SBLOCK,XP(E)::B(G)+R(F)
      • P(e);XR(D)::B(G)+R(F),XS(i)
      • R(c);S_CUTB(a)::QAB1(B)
      • R(c);N_GUARD::S(A),XR(c)
      • B(a);N_GUARD::QAB1(B)
      • B(a);S_CUTR(c)::S(A)
      • B(a);N_GUARD::QAB1(B),XB(a)
      • P(e);OGATEB::R(D)
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