MESON Chess Problem Database

Problem Display
PID: 51856 (3n4/2r5/2P1p1N1/RB1kPp2/P1p3n1/B1KPp3/1P3p2/3Q1r1q w - - 0 1)

Simoni, Francesco

The Problemist, 2004

(First published on Thu Jan 1 2004)

3n4/2r5/2P1p1N1/RB1kPp2/P1p3n1/B1KPp3/1P3p2/3Q1r1q

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qxf3#
    • 1...Qe4
      • 2.dxc4#
    • 1...Qg1
      • 2.Qf3#
    • 1...Qh2
      • 2.Qf3#
    • 1...Qh4
      • 2.Qf3#
    • 1...Qh5
      • 2.Qf3#
    • 1...Qh6
      • 2.Qf3#
    • 1...Qh7
      • 2.Qf3#
    • 1...Qh8
      • 2.Qf3#
    • 1...Rxc6
      • 2.Bxc4#
    • 1...Sxe5
      • 2.Sf4#
    • 1...Sxc6
      • 2.Bxc4#
    • 1...cxd3
      • 2.Qxd3#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Sf4#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qe4
        • 2.dxc4#
      • 1...Qh2
        • 2.Qf3#
      • 1...Qh6
        • 2.Qf3#
      • 1...f4
        • 2.Sxf4#
      • 1...Sxe5!
    • 1.Ra6?
      • threat
        • 2.Bxc4#
      • 1...Sxe5
        • 2.Sf4#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Qe4
        • 2.dxc4#
      • 1...Rxc6!
    • 1.Qc2?
      • threat
        • 2.dxc4#
      • 1...Rxc6
        • 2.Bxc4#
      • 1...Sxe5
        • 2.Sf4#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Qe4!
  • Keys
    • 1.b3!
      • threat
        • 2.bxc4#
      • 1...Rxc6
        • 2.Bxc4#
      • 1...Sxe5
        • 2.Sf4#
      • 1...cxb3
        • 2.Qxb3#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Qe4
        • 2.dxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::QAB(A),XQ(b)
    • Q(b);SBLOCK::QAR(A)+P(E)DCHECK,XP(e)
    • Q(b);N_GUARD::QAB(A)
    • Q(b);N_GUARD,P_PINP(I)::QAB(A)
    • R(j);SBLOCK,XP(J)::R(G)+B(H),DCHECK,XP(e)
    • S(f);SBLOCK,XP(I)::S(K)
    • S(k);SBLOCK,XP(J)::R(G)+B(H),DCHECK,XP(e)
    • P(e);OGATE,P_PINP(J),P_SPINP(e),XP(E)::QAR2(A),XP(e)
  • Tries
    • Try
      • B(C);
      • Threat
        • S(K)
      • Vars
        • P(e);OGATE,P_PINP(J),P_SPINP(e),XP(E)::QAR2(A),XP(e)
        • Q(b);N_GUARD::QAB(A),XQ(b)
        • Q(b);SBLOCK::QAR(A)+P(E)DCHECK,XP(e)
        • Q(b);N_GUARD::QAB(A)
        • P(h);::S(K),XP(h)
      • Refutation
        • S(f);XP(I)
    • Try
      • R(G);
      • Threat
        • B(H),XP(e)
      • Vars
        • S(f);SBLOCK,XP(I)::S(K)
        • P(e);OGATE,P_PINP(J),P_SPINP(e),XP(E)::QAR2(A),XP(e)
        • Q(b);SBLOCK::QAR(A)+P(E)DCHECK,XP(e)
      • Refutation
        • R(j);XP(J)
    • Try
      • Q(A);
      • Threat
        • P(E),XP(e)
      • Vars
        • R(j);SBLOCK,XP(J)::R(G)+B(H),DCHECK,XP(e)
        • S(f);SBLOCK,XP(I)::S(K)
        • P(e);OGATE,P_PINP(J),XP(E)::QAR2(A),XP(e)
      • Refutation
        • Q(b);
  • Actual
    • P(B);
    • Threat
      • P(B),XP(e)
    • Vars
      • R(j);SBLOCK,XP(J)::R(G)+B(H),DCHECK,XP(e)
      • S(f);SBLOCK,XP(I)::S(K)
      • P(e);OGATE,P_PINP(J),XP(B)::QAB(A),XP(e)
      • P(e);OGATE,P_PINP(J),P_SPINP(e),XP(E)::QAR2(A),XP(e)
      • Q(b);SBLOCK::QAR(A)+P(E)DCHECK,XP(e)
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