MESON Chess Problem Database

Problem Display
PID: 178535 (4B1q1/2r1N3/3krRN1/1Rb5/2p2p1B/Q3pb2/3n4/4K3 w - - 0 1)

Morra, Juan Carlos

Busmen's Chess Review, 1965

4B1q1/2r1N3/3krRN1/1Rb5/2p2p1B/Q3pb2/3n4/4K3

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Qxc5#
    • 1...Rb7
      • 2.Qxc5#
    • 1...Rd7
      • 2.Qxc5#
    • 1...Rxe7
      • 2.Qxc5#
    • 1...Bd5
      • 2.Sf5#
    • 1...Bc6
      • 2.Qxc5#
    • 1...Bxa3
      • 2.Sf5#
    • 1...Bb4
      • 2.Sf5#
  • Tries
    • 1.Qd3+?
      • 1...Bd5
        • 2.Sf5#
        • 2.Qxd5#
      • 1...Bd4
        • 2.Sf5#
      • 1...cxd3!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Qe5#
      • 1...Qxg6
        • 2.Qxe6#
      • 1...Qxe8
        • 2.Qxe6#
      • 1...Bxe3
        • 2.Sf5#
      • 1...fxe3
        • 2.Bg3#
      • 1...Be4
        • 2.Qxf4#
      • 1...Bd4
        • 2.Sf5#
      • 1...Se4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • R(i);N_GUARD::QAB1(B),XB(f)
    • R(i);N_GUARD,XS(G)::QAB1(B),XB(f)
    • B(c);SBLOCK::S(G)
    • B(c);S_CUTR(i)::QAB1(B),XB(f)
    • B(f);N_SPINB(f),XQ(B)::S(G)
    • B(f);::S(G)
  • Tries
    • Try
      • Q(B);CHECK,N_PINB(f)
      • Vars
        • B(f);P_SPINB(f)::S(G)
      • Refutation
        • P(d);XQ(B)
  • Actual
    • Q(B);N_PINB(f),P_SPINQ(B),XP(b)
    • Threat
      • QAB1(B)
    • Vars
      • Q(j);N_GUARD,XS(F)::QAR1(B),XR(h)
      • Q(j);N_GUARD,XB(H)::QAR1(B),XR(h)
      • B(f);XQ(B)::S(G)
      • P(e);OGATEB,XQ(B)::B(C)
      • B(c);N_PINQ(B)::QAB(B),XP(e)
      • B(f);::S(G)
      • S(a);N_PINQ(B)::QAB(B),XP(e)
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