MESON Chess Problem Database

Problem Display
PID: 265211 (6B1/5R2/3p4/K3k3/1Q6/6bp/4r2B/4R1n1 w - - 0 1)

Carra, Arturo

Schweizerische Schachzeitung, 1929

6B1/5R2/3p4/K3k3/1Q6/6bp/4r2B/4R1n1

#2

6 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxe4#
  • Tries
    • 1.Bxg3+?
      • 1...Ke6
        • 2.Qxd6#
      • 1...Kd5!
    • 1.Rxe2+?
      • 1...Kd5
        • 2.Rc7#
      • 1...Sxe2!
    • 1.Rf8?
      • threat
        • 2.Bxg3#
      • 1...Bf4
        • 2.Bxf4#
        • 2.Qxf4#
      • 1...Bxh2!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qd4#
      • 1...Bxe1
        • 2.Rf2#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Re4
        • 2.Rexe4#
        • 2.Qxe4#
      • 1...Bf2
        • 2.Rxf2#
      • 1...Sf3
        • 2.Rxe2#
      • 1...d5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::QAR1(C),XR(b)
  • Tries
    • Try
      • B(B);CHECK,XB(c)
      • Vars
        • K(e);N_GUARD,P-FLIGHT::QAR1(C),XP(f)
      • Refutation
        • K(e);N_SPINR(b),P-FLIGHT
    • Try
      • R(A);CHECK,XR(b)
      • Vars
        • K(e);N_GUARD,N_SPINB(c),P-FLIGHT,S_CUTS(a)::B(F)+R(E)
      • Refutation
        • S(a);XR(A)
    • Try
      • R(E);
      • Threat
        • B(B),XB(c)
      • Refutation
        • B(c);N_SPINB(c),XB(B)
  • Actual
    • R(E);N_PINB(c)
    • Threat
      • QAB1(C)
    • Vars
      • B(c);N_SPINR(b),OGATEB,P_PINQ(C),XR(A)::B(B)+R(E)
      • B(c);OGATE,P_SPINB(c),XR(E)::QAB1(C),XB(c)
      • B(c);OGATEB::B(B)+R(E),XB(c)
      • S(a);N_GUARD::R(A),XR(b)
      • P(f);OGATEB::QAB(C)
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