MESON Chess Problem Database

Problem Display
PID: 147984 (K3bb2/nB4p1/8/6R1/1Bk5/3Rrp2/3p1q2/nQ1N4 w - - 0 1)

Morra, Juan Carlos

Chess, 1955

K3bb2/nB4p1/8/6R1/1Bk5/3Rrp2/3p1q2/nQ1N4

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Sxe3#
    • 1...Qh4
      • 2.Sxe3#
    • 1...Qf1
      • 2.Sxe3#
    • 1...Qg2
      • 2.Sxe3#
    • 1...Qh2
      • 2.Sxe3#
    • 1...Bb5
      • 2.Bd5#
    • 1...Bxb4
      • 2.Sb2#
    • 1...Bc5
      • 2.Rxc5#
    • 1...Sc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
    • 1...Sb5
      • 2.Bd5#
    • 1...Sc6
      • 2.Ba6#
  • Tries
    • 1.Rc3+?
      • 1...Kd4
        • 2.Rd5#
      • 1...Rxc3!
    • 1.Qa2+?
      • 1...Kxb4
        • 2.Rd4#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Kxd3!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Rd4#
      • 1...Rxd3
        • 2.Qb4#
      • 1...Bxc5
        • 2.Bd5#
      • 1...Re5
        • 2.Rc3#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Qh4
        • 2.Sxe3#
      • 1...Re1
        • 2.Rc3#
      • 1...Re2
        • 2.Rc3#
      • 1...Re4
        • 2.Rc3#
      • 1...Re6
        • 2.Rc3#
      • 1...Re7
        • 2.Rc3#
      • 1...Sb5
        • 2.Sb2#
      • 1...Sc6
        • 2.Ba6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD::S(B),XR(d)
    • B(i);SBLOCK::B(F)
    • B(j);SBLOCK,XB(D)::S(B)
    • B(j);N_GUARD::R1(E),XB(j)
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • S(g);SBLOCK::B(F)
    • S(g);N_GUARD,S_CUTB(i)::B(F)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(f);P-FLIGHT::R1(E)
      • Refutation
        • R(d);XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);P-FLIGHT,XB(D)::R(C)
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • K(f);S_FLIGHT,XR(C)
  • Actual
    • B(D);
    • Threat
      • R1(C)
    • Vars
      • R(d);SBLOCK,XR(C)::QAR1(A)
      • B(j);SBLOCK,XB(D)::B(F)
      • R(d);N_GUARD::R1(C)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • Q(c);N_GUARD::S(B),XR(d)
      • S(g);SBLOCK::S(B)
      • S(g);N_GUARD,S_CUTB(i)::B(F)
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