MESON Chess Problem Database

Problem Display
PID: 18085 (N1R5/b7/5RpK/3kp3/3B2Q1/8/1n2P3/2r1n3 w - - 0 1)

Morra, Juan Carlos

Santiago, Joao Baptista

1st Prize, Israel Problemists' Association, 1953

N1R5/b7/5RpK/3kp3/3B2Q1/8/1n2P3/2r1n3

#2

7 + 7

3105 FIDE Album (1945-1955) 1964
5862 An ABC of Chess Problems 1970

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Rd8#
    • 1...Bxd4
      • 2.e4#
    • 1...Bb6
      • 2.Sxb6#
    • 1...Bb8
      • 2.Sb6#
    • 1...Sc4
      • 2.Sc7#
    • 1...exd4
      • 2.Qe6#
    • 1...e4
      • 2.Qd7#
  • Tries
    • 1.Rxc1?
      • threat
        • 2.Sc7#
      • 1...exd4
        • 2.Qe6#
      • 1...e4
        • 2.Qd7#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bb8
        • 2.Sb6#
        • 2.Rc5#
      • 1...Sc2!
    • 1.Rc3?
      • threat
        • 2.Sc7#
      • 1...exd4
        • 2.Qe6#
      • 1...e4
        • 2.Qd7#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bb8
        • 2.Sb6#
      • 1...Rxc3!
    • 1.Qe6+?
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kxd4!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Rd6#
      • 1...Rxc5
        • 2.Rd8#
      • 1...Bxc5
        • 2.Sc7#
      • 1...e4
        • 2.Qe6#
      • 1...Bb8
        • 2.Sb6#
      • 1...Sc4
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);SBLOCK::R(G)
    • B(g);SBLOCK,XB(B)::P(A)
    • B(g);N_GUARD::S(F),XB(g)
    • B(g);N_GUARD::S(F)
    • S(c);SBLOCK,S_CUTR(a)::S(F)
    • P(e);SBLOCK,XB(B)::QAB1(C)
    • P(e);SBLOCK::QAR2(C)
  • Tries
    • Try
      • R(G);XR(a)
      • Threat
        • S(F)
      • Vars
        • P(e);SBLOCK,XB(B)::QAB1(C)
        • P(e);SBLOCK::QAR2(C)
        • B(g);N_GUARD::S(F),XB(g)
      • Refutation
        • S(b);
    • Try
      • R(G);
      • Threat
        • S(F)
      • Vars
        • P(e);SBLOCK,XB(B)::QAB1(C)
        • P(e);SBLOCK::QAR2(C)
        • B(g);N_GUARD::S(F),XB(g)
        • B(g);N_GUARD::S(F)
      • Refutation
        • R(a);XR(G)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);P_SPINP(e),S_FLIGHT::QAR1(C),XP(e)
      • Refutation
        • K(d);P-FLIGHT,XB(B)
  • Actual
    • B(B);
    • Threat
      • R1(D)
    • Vars
      • R(a);SBLOCK,XB(B)::R(G)
      • B(g);SBLOCK,XB(B)::S(F)
      • P(e);::QAB1(C)
      • B(g);N_GUARD::S(F)
      • S(c);SBLOCK::P(A)
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