MESON Chess Problem Database

Problem Display
PID: 45880 (7b/3Q4/1p1K4/2ppp3/nP1k1p2/R7/2pN4/2BR3B w - - 0 1)

Einat, Paz

2nd Comm., Visserman MT, 1979

7b/3Q4/1p1K4/2ppp3/nP1k1p2/R7/2pN4/2BR3B

#2

8 + 9

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Bxb2#
  • Tries
    • 1.Sf3+?
      • 1...Ke4
        • 2.Sg5#
        • 2.Re1#
        • 2.Qh7#
      • 1...Kc4!
    • 1.Qh3?
      • threat
        • 2.Rd3#
        • 2.Qd3#
      • 1...Sb2
        • 2.Bxb2#
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...c4
        • 2.Sb3#
      • 1...e4
        • 2.Qxh8#
      • 1...f3!
    • 1.Qxa4?
      • threat
        • 2.Bb2#
        • 2.bxc5#
      • 1...cxd1Q
        • 2.Bb2#
      • 1...cxd1S
        • 2.bxc5#
      • 1...cxd1B
        • 2.Bb2#
      • 1...cxb4
        • 2.Bb2#
        • 2.Qxb4#
      • 1...b5
        • 2.Bb2#
      • 1...c4!
    • 1.Qf5?
      • threat
        • 2.Rd3#
        • 2.Qd3#
      • 1...c4
        • 2.Sf3#
      • 1...Sb2
        • 2.Bxb2#
      • 1...e4
        • 2.Qxd5#
      • 1...Sc3!
    • 1.Qh7?
      • threat
        • 2.Rd3#
        • 2.Qd3#
      • 1...c4
        • 2.Sf3#
      • 1...Sb2
        • 2.Bxb2#
      • 1...e4
        • 2.Qxh8#
      • 1...Sc3!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Rd3#
        • 2.Qd3#
      • 1...Sc3
        • 2.Sb3#
      • 1...c4
        • 2.Qxd5#
      • 1...Sb2
        • 2.Bxb2#
      • 1...e4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::B(A),XS(b)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAB1(H),XS(b)
        • P(e);SBLOCK::R(B)+S(D),DCHECK
        • P(g);OGATEB::QAB(H),XB(i)
      • Refutation
        • P(d);
    • Try
      • Q(H);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);XR(B)::B(A)
        • P(a);XR(B)::QAR(H)+P(F),XP(e)
        • P(h);::B(A)
      • Refutation
        • P(e);
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);SBLOCK::R(B)+S(D),DCHECK
        • S(b);N_GUARD::B(A),XS(b)
        • P(g);OGATE::QAR1(H),XP(f)
      • Refutation
        • S(b);
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);SBLOCK::R(B)+S(D),DCHECK
        • S(b);N_GUARD::B(A),XS(b)
        • P(g);OGATEB::QAB(H),XB(i)
      • Refutation
        • S(b);
  • Actual
    • Q(H);
    • Threat
      • DUALS(2)
    • Vars
      • S(b);SBLOCK::R(B)+S(D),DCHECK
      • P(e);OGATE::QAR1(H),XP(f)
      • S(b);N_GUARD::B(A),XS(b)
      • P(g);SBLOCK::R(B)+S(D),DCHECK
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