MESON Chess Problem Database

Problem Display
PID: 109689 (2Nn4/1pRpB3/Np3p2/rk6/rp6/bQ3K2/1nBPP3/2qR4 w - - 0 1)

White, Alain Campbell

Checkmate, 1901

2Nn4/1pRpB3/Np3p2/rk6/rp6/bQ3K2/1nBPP3/2qR4

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa6
      • 2.Qd5#
    • 1...Sxd1
      • 2.Qc4#
      • 2.Qd3#
    • 1...Sd3
      • 2.Qc4#
      • 2.Qxd3#
    • 1...Sc4
      • 2.Qxc4#
    • 1...bxa6
      • 2.Sd6#
      • 2.Sa7#
      • 2.Qd5#
  • Tries
    • 1.Sb8?
      • threat
        • 2.Sd6#
        • 2.Qd5#
      • 1...Qxc2
        • 2.Sd6#
      • 1...Ra6
        • 2.Qd5#
      • 1...Ra7
        • 2.Qd5#
      • 1...Ra8
        • 2.Qd5#
      • 1...Sd3
        • 2.Sd6#
        • 2.Qc4#
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qd5#
      • 1...Se6
        • 2.Sd6#
      • 1...Sf7
        • 2.Qd5#
      • 1...d5
        • 2.Sd6#
        • 2.Qxd5#
      • 1...d6
        • 2.Sxd6#
        • 2.Qd5#
      • 1...Qxd2!
    • 1.Qd3+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxd3!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rxb6#
      • 1...Kxa6
        • 2.Rxb6#
      • 1...Kxc6
        • 2.Sa7#
      • 1...Rxa6
        • 2.Qd5#
      • 1...Sxc6
        • 2.Sc7#
      • 1...bxc6
        • 2.Sc7#
      • 1...dxc6
        • 2.Sc7#
      • 1...Sc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK,XS(G)::QAR2(E)
    • S(b);N_GUARD::QAB1(E),XS(b)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XB(B)::S(J)
        • R(f);::QAR2(E)
        • S(b);N_GUARD::QAB1(E),XS(b)
        • S(l);::QAR2(E)
        • S(l);::S(J)
      • Refutation
        • Q(a);XP(C)
    • Try
      • Q(E);CHECK,N_PINP(e)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(E),XS(b)
      • Refutation
        • S(b);XQ(E)
  • Actual
    • R(H);
    • Threat
      • R1(H),XP(h)
    • Vars
      • K(g);N_SPINP(e),P_SPINP(h),S_FLIGHT,XS(G)::R1(H),XP(h)
      • K(g);N_SPINP(e),S_FLIGHT,XR(H)::S(J)
      • R(f);SBLOCK,XS(G)::QAR2(E)
      • S(l);SBLOCK,XR(H)::S(G)
      • P(j);SBLOCK,XR(H)::S(G)
      • P(k);SBLOCK,XR(H)::S(G)
      • S(b);N_GUARD::QAB1(E),XS(b)
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