MESON Chess Problem Database

Problem Display
PID: 262163 (b6K/3nQ3/8/B2p4/2pkp1N1/6P1/7R/2b1N1n1 w - - 0 1)

Somma, Francesco

Schweizerische Schachzeitung, 1933

b6K/3nQ3/8/B2p4/2pkp1N1/6P1/7R/2b1N1n1

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Rd2#
    • 1...Bd2
      • 2.Rxd2#
    • 1...Ba3
      • 2.Rd2#
    • 1...Sc5
      • 2.Qf6#
      • 2.Qe5#
      • 2.Qg7#
    • 1...Se5
      • 2.Qa7#
    • 1...Sf6
      • 2.Qa7#
    • 1...Sb8
      • 2.Qa7#
    • 1...Sf8
      • 2.Qa7#
    • 1...c3
      • 2.Qb4#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Bc3#
      • 1...c3
        • 2.Qb4#
      • 1...Bb2
        • 2.Rd2#
      • 1...Bd2
        • 2.Rxd2#
      • 1...Se2!
    • 1.Qg7+?
      • 1...Se5
        • 2.Qa7#
      • 1...Sf6
        • 2.Qa7#
      • 1...Kc5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sc2#
      • 1...Ke3
        • 2.Sc2#
      • 1...Sxe5
        • 2.Qa7#
      • 1...e3
        • 2.Rh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • B(a);N_GUARD::R(B)
    • B(a);N_GUARD::R(B),XB(a)
    • S(g);OGATE::QAB(F)
    • P(c);OGATEB::QAR2(F)
  • Tries
    • Try
      • R(B);
      • Threat
        • B(E)
      • Vars
        • P(c);OGATEB::QAR2(F)
        • B(a);N_GUARD::R(B)
        • B(a);N_GUARD::R(B),XB(a)
      • Refutation
        • S(b);
    • Try
      • Q(F);CHECK
      • Vars
        • S(g);OGATE,P_SPINS(g)::QAB(F)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • S(A)
    • Vars
      • K(d);S_FLIGHT::S(A)
      • S(g);OGATE,SBLOCK,XS(D)::QAB(F)
      • P(e);OGATEB,SBLOCK::R(B)
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