MESON Chess Problem Database

Problem Display
PID: 18366 (B1Q5/5p2/nn1N1pp1/3P2R1/1P1k3r/1p4Kp/3BP1p1/q2R2r1 w - - 0 1)

Grinblat, Arieh

3rd Prize, Israel Ring Ty., 1955

B1Q5/5p2/nn1N1pp1/3P2R1/1P1k3r/1p4Kp/3BP1p1/q2R2r1

#2

10 + 12

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3+
      • 2.Qxc3#
    • 1...Qb1
      • 2.Qc3#
    • 1...Qxd1
      • 2.Qc3#
    • 1...Qa2
      • 2.Qc3#
    • 1...Qa3
      • 2.Qc3#
    • 1...Qa4
      • 2.Qc3#
    • 1...Qa5
      • 2.Qc3#
    • 1...Re4
      • 2.Sb5#
    • 1...Rg4+
      • 2.Qxg4#
    • 1...Rh5
      • 2.Qg4#
    • 1...Rh6
      • 2.Qg4#
    • 1...Rh7
      • 2.Qg4#
    • 1...Rh8
      • 2.Qg4#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb8
      • 2.Qc5#
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sxd5
      • 2.Rxd5#
      • 2.Qc4#
    • 1...Sd7
      • 2.Qc4#
    • 1...Sxa8
      • 2.Qc4#
    • 1...b2
      • 2.Qc3#
  • Tries
    • 1.Be1+?
      • 1...Qxd1
        • 2.Bf2#
        • 2.Qc3#
      • 1...Ke3!
    • 1.Rg4+?
      • 1...Ke5
        • 2.Sxf7#
        • 2.Bf4#
      • 1...Rxg4+!
    • 1.Qe6?
      • threat
        • 2.Qe3#
        • 2.Qxf6#
      • 1...Qc3+
        • 2.Be3#
      • 1...Rg4+
        • 2.Rxg4#
        • 2.Qxg4#
      • 1...Sxb4
        • 2.Qe3#
      • 1...Sxd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...fxg5
        • 2.Qe3#
        • 2.Qf6#
      • 1...Rf1
        • 2.Qe3#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rf4
        • 2.Qe3#
      • 1...Sc4
        • 2.Sb5#
      • 1...Sd7
        • 2.Qe3#
      • 1...f5
        • 2.Qe3#
        • 2.Qf6#
      • 1...fxe6!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qe3#
      • 1...Qc3+
        • 2.Be3#
      • 1...Rg4+
        • 2.Rxg4#
      • 1...Sxd5
        • 2.Rxd5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Sc4
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 16
  • Sets
    • Q(a);CHECK,N_GUARD::QAB1(J),XQ(a)
    • Q(a);N_GUARD::QAB1(J)
    • Q(a);N_GUARD,XR(A)::QAB1(J)
    • R(g);SBLOCK::S(H)
    • R(g);CHECK,N_GUARD::QAR(J),XR(g)
    • R(g);N_GUARD::QAR(J)
    • S(h);N_GUARD::QAB1(J),XS(h)
    • S(h);N_GUARD::QAB1(J)
    • S(i);N_GUARD::QAR1(J)
    • S(i);N_GUARD::QAR1(J),XS(i)
    • S(i);N_GUARD,XB(I)::QAR1(J)
    • P(d);S_CUTQ(a)::QAB1(J)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(G);CHECK
      • Refutation
        • R(g);CHECK,XR(G)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,SBLOCK::R(A)+B(B),DCHECK
        • S(h);XP(E)::QAB1(J)
        • R(b);::QAB1(J)
        • R(g);N_GUARD::QAR1(J),XR(g)
        • R(g);::QAB1(J)
        • S(i);SBLOCK::S(H)
        • S(i);::QAB1(J)
      • Refutation
        • P(l);XQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAB1(J)
    • Vars
      • Q(a);CHECK,SBLOCK::R(A)+B(B),DCHECK
      • R(g);CHECK,N_GUARD::R(G),XR(g)
      • S(i);OGATE,XP(F)::R1(G),XS(i)
      • R(g);N_GUARD::QAR1(J),XR(g)
      • S(i);SBLOCK::S(H)
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