MESON Chess Problem Database

Problem Display
PID: 224419 (8/6Q1/7R/2Prn3/RpbkNP2/2Npp3/8/B6K w - - 0 1)

Anonymous

Wilkes-Barre Record, 1888

(First published on Thu Sep 13 1888)

8/6Q1/7R/2Prn3/RpbkNP2/2Npp3/8/B6K

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qxe5#
    • 1...Rd7
      • 2.Qxe5#
    • 1...Rd8
      • 2.Qxe5#
    • 1...e2
      • 2.Qg1#
  • Tries
    • 1.Sxd5+?
      • 1...Kxd5
        • 2.Qxe5#
      • 1...Kxe4!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sce4#
      • 1...Kxc5
        • 2.Qa7#
      • 1...Rxc5
        • 2.Sf3#
      • 1...exd2
        • 2.Qg1#
      • 1...bxc3
        • 2.Rxc4#
      • 1...e2
        • 2.Qg1#
      • 1...Rd6
        • 2.Qxe5#
      • 1...Rd7
        • 2.Qxe5#
      • 1...Rd8
        • 2.Qxe5#
      • 1...b3
        • 2.Sxb3#
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD::QAB1(I),XS(g)
    • P(b);OGATEB::QAB(I)
  • Tries
    • Try
      • S(C);CHECK,XR(f)
      • Vars
        • K(e);N_SPINS(g),P-FLIGHT,XS(C)::QAR1(I),XS(g)
      • Refutation
        • K(e);N_SPINS(g),P-FLIGHT,XS(E)
  • Actual
    • S(E);
    • Threat
      • B(A)+S(C)
    • Vars
      • K(e);N_SPINS(g),OGATEB,S_FLIGHT,XP(G)::QAB(I)
      • R(f);SBLOCK,XP(G)::S(E)
      • P(b);OGATEB,XS(E)::QAB(I)
      • P(c);OGATE,P_SPINB(d),P_SPINP(c),XS(C)::R1(D),XB(d)
      • P(b);OGATEB::QAB(I)
      • R(f);N_GUARD::QAB1(I),XS(g)
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