MESON Chess Problem Database

Problem Display
PID: 2792 (5R2/3R2N1/2n1p2B/1rp1p2B/2Pnk2p/1p1p4/1K1Q1r2/1b3Nb1 w - - 0 1)

White, Alain Campbell

Op de Hoogte, 1919

5R2/3R2N1/2n1p2B/1rp1p2B/2Pnk2p/1p1p4/1K1Q1r2/1b3Nb1

#2

9 + 13

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2+
      • 2.Sxd2#
    • 1...Bc2
      • 2.Qe3#
    • 1...Sc2
      • 2.Qxd3#
    • 1...Se2
      • 2.Qe3#
    • 1...Sf3
      • 2.Bg6#
    • 1...h3
      • 2.Sg3#
  • Tries
    • 1.Rxf2?
      • threat
        • 2.Qe3#
      • 1...Sc2
        • 2.Bf3#
        • 2.Bg6#
        • 2.Qxd3#
      • 1...Sf5
        • 2.Bf3#
      • 1...Bxf2!
    • 1.Qxf2?
      • threat
        • 2.Sd2#
        • 2.Qxh4#
      • 1...Bxf2
        • 2.Sd2#
      • 1...Bh2
        • 2.Sd2#
        • 2.Qe3#
      • 1...Se2
        • 2.Sd2#
        • 2.Bf3#
        • 2.Bg6#
        • 2.Qg2#
        • 2.Qf3#
      • 1...Sf3
        • 2.Bxf3#
        • 2.Bg6#
        • 2.Qxf3#
      • 1...Sf5
        • 2.Sd2#
        • 2.Bf3#
        • 2.Qg2#
        • 2.Qf3#
      • 1...h3
        • 2.Sd2#
        • 2.Sg3#
        • 2.Qh4#
      • 1...d2!
  • Keys
    • 1.Se8!
      • threat
        • 2.Sd6#
      • 1...Rxd2+
        • 2.Sxd2#
      • 1...Sc2
        • 2.Qxd3#
      • 1...Se2
        • 2.Qe3#
      • 1...Sf3
        • 2.Bg6#
      • 1...Sf5
        • 2.Sf6#

This anticipates 267576(1926)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(c);CHECK,XQ(C)::S(A),XR(c)
    • B(a);N_PINQ(C)::QAR1(C)
    • S(f);N_PINQ(C)::QAB1(C),XP(e)
    • S(f);N_PINQ(C)::QAR1(C)
    • S(f);N_GUARD,S_CUTR(c)::B(E)
    • P(h);N_GUARD::S(A)
  • Tries
    • Try
      • R(I);N_SPINQ(C),XR(c)
      • Threat
        • QAR1(C)
      • Vars
        • S(f);N_GUARD::B(E)
      • Refutation
        • B(b);XR(I)
    • Try
      • Q(C);N_SPINQ(C),XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);XQ(C)::S(A)
      • Refutation
        • P(e);
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • R(c);CHECK,XQ(C)::S(A),XR(c)
      • S(f);N_PINQ(C)::QAB1(C),XP(e)
      • S(f);N_PINQ(C)::QAR1(C)
      • S(f);N_GUARD,S_CUTR(c)::B(E)
      • S(f);SBLOCK,S_CUTR(c)::S(H)
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