MESON Chess Problem Database

Problem Display
PID: 133836 (1b4q1/3BB1p1/Q7/R2rkp2/3n3R/r3Np2/b3pN1K/8 w - - 0 1)

Morra, Juan Carlos

The Field, 1962

(First published on Thu Mar 15 1962)

1b4q1/3BB1p1/Q7/R2rkp2/3n3R/r3Np2/b3pN1K/8

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Sc4#
    • 1...Rd3
      • 2.Sxd3#
    • 1...Ra4
      • 2.Sd3#
    • 1...Raxa5
      • 2.Sd3#
    • 1...Bb1
      • 2.Sc4#
    • 1...Bb3
      • 2.Sd3#
    • 1...Bc4
      • 2.Sxc4#
    • 1...Bd6
      • 2.Qxd6#
    • 1...Ba7
      • 2.Qd6#
    • 1...Sb3
      • 2.Sd3#
      • 2.Sc4#
    • 1...f4
      • 2.Seg4#
    • 1...g5
      • 2.Bf6#
      • 2.Qf6#
    • 1...g6
      • 2.Bf6#
      • 2.Qf6#
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qxd4#
      • 1...Raxa5
        • 2.Sd3#
      • 1...Bxc4
        • 2.Sxc4#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Ra4
        • 2.Sd3#
      • 1...Ba7
        • 2.Qc7#
      • 1...Sc2
        • 2.Qf4#
      • 1...Sb3
        • 2.Sd3#
        • 2.Qf4#
      • 1...Sb5
        • 2.Qf4#
      • 1...Sc6
        • 2.Qf4#
      • 1...Se6
        • 2.Rxd5#
      • 1...f4
        • 2.Seg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(c);S_CUTB(a)::S(C)
    • R(c);N_GUARD::S(A),XR(c)
    • R(c);N_GUARD::S(A)
    • R(c);N_GUARD,N_SPINR(f),XR(E)::S(A)
    • B(a);N_GUARD::S(C)
    • B(a);S_CUTR(c)::S(A)
    • B(a);N_GUARD::S(C),XB(a)
    • B(j);N_GUARD::QAB1(F),XB(j)
    • B(j);N_GUARD::QAB1(F)
    • P(h);N_GUARD,SBLOCK::S(C)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F),XS(e)
    • Vars
      • R(c);N_GUARD,N_SPINR(f),XR(E)::S(A)
      • B(a);XQ(F)::S(C),XB(a)
      • R(c);N_GUARD::S(A),XR(c)
      • R(c);N_GUARD::S(A)
      • B(j);N_GUARD::QAB(F)
      • S(e);OGATE::QAB1(F)
      • S(e);N_SPINR(f),OGATE::QAB1(F)
      • S(e);S_CUTQ(k)::R1(E),XR(f)
      • P(h);N_GUARD,SBLOCK::S(C)
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