MESON Chess Problem Database

Problem Display
PID: 141287 (8/2Bpq3/2p5/N2k1B2/1p5p/5N1K/3rp3/Q1R5 w - - 0 1)

di Scala, Pascal

Phenix, 1989

8/2Bpq3/2p5/N2k1B2/1p5p/5N1K/3rp3/Q1R5

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qe5#
    • 1...Qg5
      • 2.Qe5#
    • 1...Qd8
      • 2.Qe5#
    • 1...Qf8
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qf7
      • 2.Qe5#
    • 1...Qh7
      • 2.Qe5#
    • 1...Ra2
      • 2.Qd4#
    • 1...Rc2
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
  • Tries
    • 1.Rc5+?
      • 1...Qxc5
        • 2.Qe5#
      • 1...Kxc5!
    • 1.Qc3?
      • threat
        • 2.Qxd2#
        • 2.Qb3#
        • 2.Qc4#
      • 1...e1Q
        • 2.Qb3#
        • 2.Qc4#
      • 1...e1S
        • 2.Qb3#
        • 2.Qc4#
      • 1...e1B
        • 2.Qb3#
        • 2.Qc4#
      • 1...Qc5
        • 2.Qe5#
        • 2.Qxc5#
      • 1...Qg5
        • 2.Qe5#
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Qf6
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Qe3
        • 2.Qc4#
      • 1...Qe4
        • 2.Qc5#
      • 1...Qe5
        • 2.Qxe5#
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Qg7
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Rd1
        • 2.Qb3#
        • 2.Qc4#
      • 1...Ra2
        • 2.Qd4#
        • 2.Qb3#
        • 2.Qd3#
        • 2.Qc4#
      • 1...Rb2
        • 2.Qd4#
        • 2.Qd3#
        • 2.Qc4#
      • 1...Rc2
        • 2.Qd4#
      • 1...Rd3
        • 2.Qxd3#
        • 2.Qc4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...b3
        • 2.Qxd2#
        • 2.Qxb3#
        • 2.Qc4#
      • 1...c5
        • 2.Qxd2#
        • 2.Qc4#
      • 1...bxc3!
    • 1.Qa2+?
      • 1...b3
        • 2.Qxb3#
        • 2.Qxd2#
      • 1...Rxa2!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb6#
      • 1...Kc5
        • 2.Qa5#
      • 1...Rc2
        • 2.Qd4#
      • 1...Qc5
        • 2.Qe5#
      • 1...Qe3
        • 2.Sxe3#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_GUARD::QAR1(A)
    • Q(h);N_GUARD::QAR1(A),XQ(h)
    • R(a);N_GUARD::QAR1(A)
    • R(a);N_GUARD::QAR1(A),XR(a)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • Q(h);SBLOCK,XR(B)::QAR1(A)
      • Refutation
        • K(e);P-FLIGHT,XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(h);P_PINS(C)::QAB1(A)
        • Q(h);N_GUARD::QAR1(A)
        • R(a);N_GUARD::QAR1(A)
        • R(a);N_GUARD::QAR1(A),XR(a)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • R(a);XQ(A)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(e);P-FLIGHT::QAR2(A)
      • R(a);N_GUARD::QAR1(A)
      • Q(h);N_GUARD,SBLOCK::QAR1(A)
      • Q(h);N_GUARD,P_PINS(C)::S(E),XQ(h)
      • P(f);OGATEB,SBLOCK::QAB(A)
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