MESON Chess Problem Database

Problem Display
PID: 136496 (3n2B1/2r5/r3p3/1Np4R/p1p1k1p1/2pp1pP1/Kb3P2/3QN3 w - - 0 1)

Shire, David J

2nd HM., The Problemist, 2010

3n2B1/2r5/r3p3/1Np4R/p1p1k1p1/2pp1pP1/Kb3P2/3QN3

#2

8 + 13

56 The Problemist 2011
133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Bh7#
    • 1...Rh7
      • 2.Bxh7#
    • 1...Rc8
      • 2.Bh7#
    • 1...Sf7
      • 2.Bh7#
    • 1...d2
      • 2.Qc2#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Qe1#
      • 1...dxc2
        • 2.Qxc2#
      • 1...Bc1
        • 2.Sxc3#
      • 1...d2!
    • 1.Sg2?
      • threat
        • 2.Qe1#
      • 1...fxg2
        • 2.Qxg4#
      • 1...d2
        • 2.Qc2#
      • 1...Bc1!
    • 1.Sxd3?
      • threat
        • 2.Re5#
      • 1...cxd3
        • 2.Qe1#
      • 1...Sc6
        • 2.Sxc5#
      • 1...Sf7
        • 2.Bh7#
      • 1...e5
        • 2.Rxe5#
      • 1...c2!
    • 1.Sd6+?
      • 1...Kd4
        • 2.Sc2#
      • 1...Rxd6!
    • 1.Qc1?
      • threat
        • 2.Qe3#
        • 2.Qf4#
      • 1...Rf7
        • 2.Qe3#
      • 1...d2
        • 2.Qc2#
      • 1...e5
        • 2.Qe3#
      • 1...Bxc1!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.Re5#
      • 1...gxf3
        • 2.Qe1#
      • 1...d2
        • 2.Qe2#
      • 1...Sc6
        • 2.Sd6#
      • 1...Sf7
        • 2.Bh7#
      • 1...c2
        • 2.Sd2#
      • 1...e5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(l);N_GUARD::B(H)
    • R(l);N_GUARD::B(H),XR(l)
    • S(m);S_CUTR(l)::B(H)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR(A)
      • Vars
        • P(c);OGATE,XS(B)::QAB(A),XP(c)
        • B(a);N_GUARD::S(F),XP(b)
      • Refutation
        • P(c);
    • Try
      • S(B);
      • Threat
        • QAR(A)
      • Vars
        • P(d);OGATE,XS(B)::QAR2(A),XP(h)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • B(a);
    • Try
      • S(B);XP(c)
      • Threat
        • R1(G)
      • Vars
        • P(f);SBLOCK,XS(B)::QAR(A)
        • S(m);S_CUTR(l)::S(B),XP(i)
        • S(m);S_CUTR(l)::B(H)
        • P(k);::R1(G),XP(k)
      • Refutation
        • P(b);
    • Try
      • S(F);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINP(c)::S(B)
      • Refutation
        • R(j);XS(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(l);::QAR1(A)
        • P(c);OGATEB::QAB(A)
        • P(k);::QAR1(A)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • S(B);XP(d)
    • Threat
      • R1(G)
    • Vars
      • P(h);SBLOCK,XS(B)::QAR(A)
      • P(c);N_GUARD::QAR2(A)
      • S(m);S_CUTR(j)::S(F)
      • S(m);S_CUTR(l)::B(H)
      • P(b);N_GUARD::S(B)
      • P(k);::R1(G),XP(k)
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