MESON Chess Problem Database

Problem Display
PID: 223333 (8/4NN2/8/1b4p1/nK1kp3/3p4/5R2/2Q5 w - - 0 1)

Slater, George James

San Francisco Argonaut, 1885

8/4NN2/8/1b4p1/nK1kp3/3p4/5R2/2Q5

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
  • Tries
    • 1.Qa1+?
      • 1...Sb2
        • 2.Qa7#
      • 1...Sc3
        • 2.Qa7#
      • 1...Ke3!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Rf4#
      • 1...Ke3
        • 2.Sf5#
      • 1...d2
        • 2.Rxd2#
      • 1...e3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::QAB1(A)
    • S(b);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);OGATE,P_SPINS(b)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(B)
    • Vars
      • K(c);S_FLIGHT::S(D)
      • P(a);::QAB(A)+R(B),DCHECK,XP(a)
      • P(d);OGATEB,SBLOCK::QAR(A)
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