MESON Chess Problem Database

Problem Display
PID: 120794 (8/8/1p2N3/1rp4q/2N1k1pp/3R4/Q7/3R2nK w - - 0 1)

Wheeler, Charles Henry

St. John Globe, 1888

8/8/1p2N3/1rp4q/2N1k1pp/3R4/Q7/3R2nK

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Re3#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Re3#
        • 2.Rg3#
        • 2.Rh3#
      • 1...Qd5
        • 2.Re3#
      • 1...Rb2
        • 2.Re3#
      • 1...Rb3
        • 2.Rxb3#
        • 2.Rc3#
        • 2.Re3#
      • 1...Sf3
        • 2.R3d2#
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Re3#
        • 2.Rd4#
        • 2.Rd5#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
      • 1...Sh3
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Re3#
        • 2.Rg3#
        • 2.Rxh3#
      • 1...g3
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Re3#
        • 2.Rxg3#
      • 1...h3
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Re3#
        • 2.Rg3#
        • 2.Rxh3#
      • 1...Kf5!
    • 1.Qa8+?
      • 1...Qd5
        • 2.Qxd5#
      • 1...Kf5!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Rf4#
      • 1...Kxf3
        • 2.Qg2#
      • 1...Sxf3
        • 2.Qc2#
      • 1...gxf3
        • 2.Qc2#
      • 1...Qf7
        • 2.Sg5#
      • 1...Qe5
        • 2.Sd2#
      • 1...Qf5
        • 2.Re3#
      • 1...Qg5
        • 2.Sxg5#
      • 1...Qh6
        • 2.Qa8#
      • 1...Se2
        • 2.Qxe2#
      • 1...Sh3
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • Q(g);SBLOCK::R1(D)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(6)
      • Vars
        • Q(g);::QAB(C)+R(D),DCHECK
        • R(e);::QAB(C)+R(D),DCHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::QAB1(C),XQ(g)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • R1(D)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(C)
      • S(a);SBLOCK,XR(D)::QAB(C)
      • P(c);SBLOCK,XR(D)::QAB(C)
      • Q(g);N_GUARD::S(F)
      • Q(g);SBLOCK::S(E)
      • Q(g);SBLOCK::R1(D)
      • Q(g);N_GUARD::S(F),XQ(g)
      • Q(g);N_GUARD::QAB(C)
      • S(a);N_GUARD::QAR2(C),XS(a)
      • S(a);N_GUARD::QAR2(C)
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