MESON Chess Problem Database

Problem Display
PID: 190150 (4r3/4p3/6Np/2Q1B1kp/4B1np/4P2K/5N2/6R1 w - - 0 1)

Wainwright, Joseph CJ

Pittsburgh Gazette-Times, 1913

4r3/4p3/6Np/2Q1B1kp/4B1np/4P2K/5N2/6R1

#2

8 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Qxe7#
    • 1...Rb8
      • 2.Qxe7#
    • 1...Rc8
      • 2.Qxe7#
    • 1...Rd8
      • 2.Qxe7#
    • 1...Rg8
      • 2.Qxe7#
    • 1...Rh8
      • 2.Qxe7#
  • Tries
    • 1.Sf8?
      • threat
        • 2.Se6#
        • 2.Sh7#
      • 1...e6
        • 2.Sh7#
      • 1...Rxf8!
    • 1.Sh8?
      • threat
        • 2.Sf7#
      • 1...Rxh8
        • 2.Qxe7#
      • 1...Rf8!
    • 1.Bg3+?
      • 1...Se5
        • 2.Bxh4#
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...e5
        • 2.Bxh4#
      • 1...Kf6!
  • Keys
    • 1.Kg2!
      • threat
        • 2.Sh3#
      • 1...Sxe3+
        • 2.Qxe3#
      • 1...h3+
        • 2.Sxh3#
      • 1...Sxf2
        • 2.Kxf2#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Sh2
        • 2.Kxh2#
      • 1...Sf6
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(g);N_GUARD::QAB(F),XP(f)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::S(H)
      • Refutation
        • R(g);XS(H)
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • R(g);N_GUARD,XS(H)::QAB(F),XP(f)
      • Refutation
        • R(g);
    • Try
      • B(G);CHECK,N_PINS(a)
      • Vars
        • P(f);P_SPINP(f)::B(G),XP(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • K(D);N_PINS(a),S_FLIGHT
    • Threat
      • S(B)
    • Vars
      • S(a);CHECK,OGATE,XP(C)::QAB(F),XS(a)
      • P(b);CHECK::S(B),XP(b)
      • S(a);XS(B)::R(A)+K(D),XS(a)
      • S(a);OGATE,P_SPINS(a),XB(G)::QAR2(F),XS(a)
      • S(a);::R(A)+K(D),XS(a)
      • S(a);SBLOCK::QAR(F)+B(G),DCHECK
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