MESON Chess Problem Database

Problem Display
PID: 2168 (R1R5/3k3b/P5N1/8/3N1K2/4p3/rP5n/n2Q4 w - - 0 1)

Challenger, Alfred Clement

Reading Observer, 1903

R1R5/3k3b/P5N1/8/3N1K2/4p3/rP5n/n2Q4

#2

8 + 6

2794 Terms & Themes of Chess Problems 1907
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Tries
    • 1.Sf8+?
      • 1...Kd6
        • 2.Sf5#
      • 1...Ke7!
    • 1.Qc2?
      • threat
        • 2.Rd8#
        • 2.Qc6#
        • 2.Qc7#
      • 1...Kd6
        • 2.Rd8#
        • 2.Qc6#
      • 1...Rxa6
        • 2.Rd8#
        • 2.Qc7#
      • 1...Bxg6
        • 2.Qc7#
      • 1...Sxc2!
    • 1.Qa4+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Rxa4!
    • 1.Qg4+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Sxg4!
    • 1.Qc1?
      • threat
        • 2.Rd8#
        • 2.Qc6#
        • 2.Qc7#
      • 1...Kd6
        • 2.Rd8#
        • 2.Qc6#
      • 1...Rxa6
        • 2.Rd8#
        • 2.Qc7#
      • 1...Bxg6
        • 2.Qc7#
      • 1...Sc2!
  • Keys
    • 1.Ke5!
      • threat
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Ra5+
        • 2.Sb5#
      • 1...Sf3+
        • 2.Sxf3#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Rxb2
        • 2.Sc2#
      • 1...Rxa6
        • 2.Sc6#
      • 1...Bxg6
        • 2.Sf5#
      • 1...Ra3
        • 2.Sb3#
      • 1...Ra4
        • 2.Qxa4#
      • 1...Bg8
        • 2.Se6#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sb3
        • 2.Sxb3#
      • 1...Sf1
        • 2.Qg4#
      • 1...e2
        • 2.Sxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR(A)+S(C),DCHECK
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);XS(F)::QAR1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(A)
      • Refutation
        • R(b);P_PINS(C),XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(A)
      • Refutation
        • S(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);XS(F)::QAR1(A)
      • Refutation
        • S(a);
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • DUALS(8)
    • Vars
      • R(b);CHECK::QAR(A)+S(C)
      • S(c);CHECK::QAR(A)+S(C),XS(c)
      • S(c);CHECK,N_GUARD::QAB(A),XS(c)
      • R(b);XP(B)::QAR(A)+S(C)
      • R(b);XP(E)::QAR(A)+S(C)
      • B(f);XS(F)::QAR(A)+S(C)
      • R(b);::QAR(A)+S(C)
      • R(b);N_GUARD::QAB(A),XR(b)
      • B(f);::QAR(A)+S(C)
      • S(a);::QAR(A)+S(C),XS(a)
      • S(c);N_GUARD::QAB(A)
      • P(d);::QAR(A)+S(C),XP(d)
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