MESON Chess Problem Database

Problem Display
PID: 175811 (2B3n1/6Q1/5p2/3pR3/3p1k2/2N2p1K/3N1r1b/3n2B1 w - - 0 1)

McAllister, George W

Philadelphia Times, 1898

2B3n1/6Q1/5p2/3pR3/3p1k2/2N2p1K/3N1r1b/3n2B1

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qc7#
    • 1...Rf1
      • 2.Bxh2#
      • 2.Rf5#
    • 1...Rxd2
      • 2.Rf5#
    • 1...Re2
      • 2.Rf5#
    • 1...Rg2
      • 2.Rf5#
    • 1...Bxg1
      • 2.Qg3#
    • 1...Bg3
      • 2.Qxg3#
    • 1...fxe5
      • 2.Sxd5#
    • 1...f5
      • 2.Sxd5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sxd5#
        • 2.Rf5#
        • 2.Qg4#
      • 1...Sxc3
        • 2.Qg4#
      • 1...dxc3
        • 2.Qg4#
      • 1...dxc4
        • 2.Re4#
      • 1...fxe5
        • 2.Qxe5#
        • 2.Qg4#
      • 1...Rg2
        • 2.Sxd5#
        • 2.Rf5#
      • 1...Sh6
        • 2.Sxd5#
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
        • 2.Qg4#
      • 1...f5
        • 2.Sxd5#
        • 2.Rxf5#
      • 1...Se3!
    • 1.Se2+?
      • 1...Kxe5
        • 2.Qc7#
      • 1...Rxe2
        • 2.Rf5#
      • 1...fxe2!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Bxh2#
      • 1...Kxe5
        • 2.Bxh2#
      • 1...Rxg2
        • 2.Rf5#
      • 1...Bxg1
        • 2.Qg3#
      • 1...fxe5
        • 2.Sxd5#
      • 1...Bg3
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(f);OGATEB,P_SPINP(h),S_FLIGHT,XR(E)::QAB(F)
    • R(b);XS(B)::R1(E)
    • R(b);::R1(E)
    • B(c);N_GUARD,XB(A)::QAB1(F)
    • B(c);N_GUARD::QAB1(F),XB(c)
    • P(h);XR(E)::S(C),XP(g)
    • P(h);::S(C),XP(g)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);XS(C)::QAR1(F)
        • P(e);XS(C)::QAR1(F)
        • P(g);N_GUARD,XS(B)::R1(E)
      • Refutation
        • S(a);
    • Try
      • S(C);CHECK
      • Vars
        • K(f);P_SPINP(h),S_FLIGHT,XR(E)::QAB(F)
        • R(b);XS(C)::R1(E)
      • Refutation
        • P(d);XS(C)
  • Actual
    • Q(F);
    • Threat
      • B(A),XB(c)
    • Vars
      • K(f);S_FLIGHT,XR(E)::B(A),XB(c)
      • R(b);XQ(F)::R1(E)
      • B(c);N_GUARD,XB(A)::QAB1(F)
      • P(h);SBLOCK,XR(E)::S(C),XP(g)
      • B(c);N_GUARD::QAB1(F),XB(c)
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