MESON Chess Problem Database

Problem Display
PID: 94551 (1b4rn/1B2Q3/r3N1pK/p1p1pkpp/R2P2bP/5Nn1/1B6/5R2 w - - 0 1)

Barnes, Barry Peter

British Chess Magazine, 1968

1b4rn/1B2Q3/r3N1pK/p1p1pkpp/R2P2bP/5Nn1/1B6/5R2

#2

10 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe6
      • 2.Qxg5#
    • 1...Sf7+
      • 2.Qxf7#
    • 1...cxd4
      • 2.Sfxd4#
    • 1...gxh4
      • 2.Sxh4#
  • Tries
    • 1.Sd2+?
      • 1...Sxf1
        • 2.Be4#
      • 1...Bf3!
    • 1.Sh2+?
      • 1...Bf3
        • 2.Rxf3#
      • 1...Sxf1!
    • 1.Sxe5+?
      • 1...Bf3
        • 2.Rxf3#
      • 1...Sxf1!
    • 1.Sfxg5+?
      • 1...Sxf1
        • 2.Be4#
      • 1...Bf3!
    • 1.Sg7+?
      • 1...Kf4
        • 2.Bc1#
        • 2.Qxg5#
      • 1...Rxg7!
    • 1.Bd5?
      • threat
        • 2.Qxg5#
      • 1...Sf7+
        • 2.Qxf7#
      • 1...gxh4
        • 2.Sxh4#
        • 2.Qg5#
      • 1...Se4!
    • 1.d5?
      • threat
        • 2.Qxg5#
      • 1...Sf7+
        • 2.Qxf7#
      • 1...gxh4
        • 2.Sxh4#
        • 2.Qg5#
      • 1...Se4
        • 2.Sfd4#
      • 1...c4!
  • Keys
    • 1.dxe5!
      • threat
        • 2.Qf6#
      • 1...Sf7+
        • 2.Qxf7#
      • 1...Rxe6
        • 2.Qxg5#
      • 1...Bxe5
        • 2.Sfd4#
      • 1...Rf8
        • 2.Sg7#
      • 1...Se4
        • 2.Bxe4#

This is a version of 801

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(i);SBLOCK,XS(G)::QAR1(J),XP(g)
    • S(m);CHECK,N_GUARD::QAR2(J),XS(m)
    • P(d);XP(E)::R(A)+S(C),DCHECK,XP(d)
    • P(g);XP(F)::R(A)+S(C),DCHECK,XP(g)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);XR(A)::B(I)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • S(C);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R(A),XB(b)
      • Refutation
        • S(a);XR(A)
    • Try
      • S(C);CHECK,XP(e)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R(A),XB(b)
      • Refutation
        • S(a);XR(A)
    • Try
      • S(C);CHECK,XP(g)
      • Vars
        • S(a);XR(A)::B(I)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • S(G);CHECK
      • Refutation
        • R(l);XS(G)
    • Try
      • B(I);
      • Threat
        • QAR1(J),XP(g)
      • Vars
        • S(m);CHECK,N_GUARD::QAR2(J),XS(m)
      • Refutation
        • S(a);
    • Try
      • P(E);
      • Threat
        • QAR1(J),XP(g)
      • Vars
        • S(m);CHECK,N_GUARD::QAR2(J),XS(m)
        • S(a);SBLOCK::R(A)+S(C),DCHECK
      • Refutation
        • P(d);
  • Actual
    • P(E);XP(e)
    • Threat
      • QAR1(J)
    • Vars
      • S(m);CHECK,N_GUARD::QAR2(J),XS(m)
      • R(i);SBLOCK,XS(G)::QAR1(J),XP(g)
      • B(k);SBLOCK,XP(E)::R(A)+S(C),DCHECK
      • R(l);N_GUARD::S(G)
      • S(a);N_GUARD::B(I),XS(a)
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