MESON Chess Problem Database

Problem Display
PID: 185082 (R4b2/3p4/8/rN1Q1K2/k2p4/1n1n1p2/2N5/1r6 w - - 0 1)

Rains, Cyril George

The Observer, 1930

(First published on Sun Apr 6 1930)

R4b2/3p4/8/rN1Q1K2/k2p4/1n1n1p2/2N5/1r6

#2

5 + 9

5454 Near Snap 2018
15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Qc4#
  • Tries
    • 1.Sbxd4?
      • threat
        • 2.Qb5#
      • 1...Bc5
        • 2.Qxd7#
      • 1...Sa1
        • 2.Rxa5#
        • 2.Qxa5#
      • 1...Sbc1
        • 2.Rxa5#
        • 2.Qxa5#
      • 1...Sd2
        • 2.Rxa5#
        • 2.Qxa5#
      • 1...Sbc5
        • 2.Qa2#
      • 1...Sdc5
        • 2.Qc4#
      • 1...Sxd4+!
    • 1.Sd6?
      • threat
        • 2.Qb5#
      • 1...Sa1
        • 2.Rxa5#
      • 1...Sbc1
        • 2.Rxa5#
      • 1...Sd2
        • 2.Rxa5#
      • 1...Sbc5
        • 2.Qa2#
      • 1...Sdc5
        • 2.Qc4#
      • 1...Bxd6!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qb5#
      • 1...Bc5
        • 2.Qxd7#
      • 1...Sa1
        • 2.Rxa5#
      • 1...Sbc1
        • 2.Rxa5#
      • 1...Sd2
        • 2.Rxa5#
      • 1...Sbc5
        • 2.Qa2#
      • 1...Sdc5
        • 2.Qc4#

Anticipated by 21062(1916)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD,S_CUTB(i)::QAR2(C)
  • Tries
    • Try
      • S(B);P_SPINQ(C),XP(f)
      • Threat
        • QAB1(C)
      • Vars
        • B(i);N_PINQ(C)::QAB(C),XP(h)
        • S(b);N_PINQ(C)::QAR2(C)
        • S(c);N_PINQ(C)::QAR2(C)
      • Refutation
        • S(b);CHECK,XS(B)
    • Try
      • S(B);P_SPINQ(C)
      • Threat
        • QAB1(C)
      • Vars
        • S(b);N_GUARD::R1(E),XR(g)
        • S(b);N_PINQ(C)::QAR2(C)
        • S(c);N_PINQ(C)::QAR2(C)
      • Refutation
        • B(i);XS(B)
  • Actual
    • S(B);P_SPINQ(C)
    • Threat
      • QAB1(C)
    • Vars
      • B(i);N_PINQ(C)::QAB(C),XP(h)
      • S(b);N_GUARD::R1(E),XR(g)
      • S(b);N_PINQ(C)::QAR2(C)
      • S(c);N_PINQ(C)::QAR2(C)
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