MESON Chess Problem Database

Problem Display
PID: 227928 (2R5/2n3r1/6r1/N1k5/P1N5/K2R4/n7/3Q3b w - - 0 1)

Lamba, Stelian

Deutsche Schachzeitung, 1965

2R5/2n3r1/6r1/N1k5/P1N5/K2R4/n7/3Q3b

#2

7 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Rd5#
    • 1...Bg2
      • 2.Qg1#
    • 1...Bd5
      • 2.Rxd5#
  • Tries
    • 1.Qh5+?
      • 1...Bd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Rg5!
    • 1.Qb1?
      • threat
        • 2.Qb5#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Bc6
        • 2.Qb6#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Rc6!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qb5#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rc6
        • 2.Sb7#
      • 1...Bc6
        • 2.Qb6#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(d);S_CUTB(a)::R1(C)
    • B(a);S_CUTR(d)::QAB(A)
    • B(a);N_GUARD::R1(C),XB(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(d);N_GUARD::QAB1(A),XR(d)
        • B(a);N_SPINS(e),S_CUTR(d)::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • R(d);N_SPINS(e)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(d);N_GUARD::QAB1(A),XR(d)
      • R(d);N_SPINS(e),SBLOCK,S_CUTB(a)::S(F)
      • B(a);N_SPINS(e),S_CUTR(d)::QAB1(A)
      • S(b);N_GUARD::QAB1(A)
      • S(b);N_GUARD::QAB1(A),XS(b)
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