MESON Chess Problem Database

Problem Display
PID: 258666 (6Q1/2pp2N1/2R1rp2/RB1N4/K3k3/8/1B2Pn1p/6br w - - 0 1)

Pringle, TA

English Mechanic and World of Science, 1904

(First published on Fri Feb 5 1904)

6Q1/2pp2N1/2R1rp2/RB1N4/K3k3/8/1B2Pn1p/6br

#2

9 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Rc4#
    • 1...Rd6
      • 2.Rc4#
    • 1...Re7
      • 2.Rc4#
    • 1...Re8
      • 2.Rc4#
    • 1...Sd1
      • 2.Bd3#
    • 1...Sd3
      • 2.Bxd3#
    • 1...Sh3
      • 2.Bd3#
    • 1...Sg4
      • 2.Bd3#
    • 1...dxc6
      • 2.Qxe6#
    • 1...d6
      • 2.Qxe6#
  • Tries
    • 1.Ba6?
      • threat
        • 2.Rc4#
      • 1...dxc6
        • 2.Qxe6#
      • 1...Sd1
        • 2.Bd3#
      • 1...Sd3
        • 2.Bxd3#
      • 1...Sh3
        • 2.Bd3#
      • 1...Sg4
        • 2.Bd3#
      • 1...Rxc6!
    • 1.Rxe6+?
      • 1...dxe6
        • 2.Qxe6#
      • 1...Kxd5!
    • 1.Qh7+?
      • 1...f5
        • 2.Qxf5#
      • 1...Kxd5!
  • Keys
    • 1.Sh5!
      • 1...Kxd5
        • 2.Sxf6#
      • 1...Kf5
        • 2.Sg3#
      • 1...Rxc6
        • 2.Sg3#
      • 1...dxc6
        • 2.Qxe6#
      • 1...Re5
        • 2.Sg3#
      • 1...Rd6
        • 2.Sg3#
      • 1...Re7
        • 2.Sg3#
      • 1...Re8
        • 2.Sg3#
      • 1...Sd1
        • 2.Bd3#
      • 1...Sd3
        • 2.Bxd3#
      • 1...Sh3
        • 2.Bd3#
      • 1...Sg4
        • 2.Bd3#
      • 1...f5
        • 2.Qg2#
      • 1...d6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(f);::R(G)
    • S(c);N_GUARD::B(E)
    • S(c);N_GUARD::B(E),XS(c)
    • P(i);N_GUARD,XR(G)::QAR2(I),XR(f)
    • P(i);N_GUARD::QAR2(I),XR(f)
  • Tries
    • Try
      • B(E);
      • Threat
        • R(G)
      • Vars
        • P(i);N_GUARD,XR(G)::QAR2(I),XR(f)
        • S(c);N_GUARD::B(E)
        • S(c);N_GUARD::B(E),XS(c)
      • Refutation
        • R(f);XR(G)
    • Try
      • R(G);CHECK,XR(f)
      • Vars
        • P(i);OGATE,XR(G)::QAR2(I),XP(i)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
    • Try
      • Q(I);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAB1(I),XP(g)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
  • Actual
    • S(H);
    • Vars
      • K(e);N_GUARD,P_SPINR(f),S_FLIGHT,XS(F)::S(H),XP(g)
      • K(e);N_GUARD,S_FLIGHT::S(H)
      • R(f);XR(G)::S(H)
      • P(i);N_GUARD,XR(G)::QAR2(I),XR(f)
      • R(f);::S(H)
      • S(c);N_GUARD::B(E)
      • S(c);N_GUARD::B(E),XS(c)
      • P(g);SBLOCK::QAB(I)
      • P(i);N_GUARD::QAR2(I),XR(f)
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