MESON Chess Problem Database

Problem Display
PID: 53535 (8/q4p2/1b2n1R1/4P3/r4k2/5N1r/4QP2/BBn1NK1b w - - 0 1)

Morra, Juan Carlos

Chess Life, 1955

8/q4p2/1b2n1R1/4P3/r4k2/5N1r/4QP2/BBn1NK1b

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.fxg3#
    • 1...Rxa1
      • 2.Qe4#
    • 1...Ra2
      • 2.Qe4#
    • 1...Ra3
      • 2.Qe4#
    • 1...Rd4
      • 2.Qe3#
    • 1...Re4
      • 2.Qxe4#
    • 1...Ra5
      • 2.Qe4#
    • 1...Ra6
      • 2.Qe4#
    • 1...Bg2+
      • 2.Sxg2#
    • 1...Bd4
      • 2.Qe4#
    • 1...Sd4
      • 2.Qd2#
      • 2.Qe3#
      • 2.Qe4#
    • 1...Sc5
      • 2.Qd2#
      • 2.Qe3#
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rg4#
      • 1...Bg2+
        • 2.Sxg2#
      • 1...Sxe2
        • 2.Sxe2#
      • 1...fxg6
        • 2.Sxe6#
      • 1...Re3
        • 2.Qxe3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Rh4
        • 2.Qe3#
      • 1...Rf3
        • 2.Qe4#
      • 1...Rg3
        • 2.fxg3#
      • 1...Bf3
        • 2.Qe3#
      • 1...Sg5
        • 2.Rf6#
      • 1...f5
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 8
  • Sets
    • R(c);OGATE::P(F),XR(c)
    • R(d);N_GUARD,XB(A)::QAR1(E)
    • R(d);N_GUARD::QAR1(E)
    • R(d);S_CUTB(f)::QAB1(E)
    • R(d);N_GUARD::QAR1(E),XR(d)
    • B(b);CHECK,N_GUARD::S(C),XB(b)
    • B(f);S_CUTR(d)::QAR1(E)
  • Actual
    • S(G);
    • Threat
      • R1(I)
    • Vars
      • B(b);CHECK,N_GUARD::S(C),XB(b)
      • S(a);XQ(E)::S(G),XS(a)
      • P(i);N_GUARD,XR(I)::S(G),XS(g)
      • R(c);N_GUARD::QAB1(E),XR(c)
      • B(b);N_GUARD::QAR1(E),XB(b)
      • R(c);N_GUARD::QAB1(E)
      • R(c);P_PINP(F),S_CUTB(b)::QAR1(E)
      • R(c);OGATE::P(F),XR(c)
      • B(b);S_CUTR(c)::QAB1(E)
      • S(g);SBLOCK::R(I)
      • P(i);N_GUARD::S(G),XS(g)
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