MESON Chess Problem Database

Problem Display
PID: 243300 (3R4/2r1N3/b2bp1nB/4q3/pQPk2N1/4pP2/2PP2n1/K7 w - - 0 1)

Andersson, Gunnar

Norsk Sjakkblad, 1928

3R4/2r1N3/b2bp1nB/4q3/pQPk2N1/4pP2/2PP2n1/K7

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Rxd6#
    • 1...Qg7
      • 2.Rxd6#
    • 1...Qh8
      • 2.Rxd6#
    • 1...Qc5
      • 2.Qc3#
    • 1...Rc5
      • 2.Qc3#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Ra7
      • 2.Sc6#
    • 1...Rb7
      • 2.Sc6#
    • 1...Rd7
      • 2.Sc6#
    • 1...Bb7
      • 2.c5#
    • 1...Bc8
      • 2.c5#
  • Tries
    • 1.Bxe3+?
      • 1...Qxe3
        • 2.Rxd6#
      • 1...Sxe3!
    • 1.dxe3+?
      • 1...Qxe3
        • 2.Rxd6#
      • 1...Sxe3!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Rxd6#
      • 1...Sxe7
        • 2.Bxe5#
      • 1...Rc5
        • 2.Qc3#
      • 1...Rc6
        • 2.Sxc6#
      • 1...Rd7
        • 2.Sc6#
      • 1...Bb7
        • 2.c5#
      • 1...S2f4
        • 2.dxe3#
      • 1...S6f4
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD::R(J),XB(g)
    • Q(e);SBLOCK::QAB1(E)
    • R(j);SBLOCK::QAB1(E)
    • R(j);N_GUARD::S(I),XR(j)
    • R(j);N_GUARD::S(I)
    • R(j);N_GUARD,N_SPINB(g)::S(I)
    • B(f);N_GUARD::QAR(E)+P(F)
  • Tries
    • Try
      • B(H);CHECK,XP(b)
      • Vars
        • Q(e);XB(H)::R(J),XB(g)
      • Refutation
        • S(a);XB(H)
    • Try
      • P(C);CHECK,XP(b)
      • Vars
        • Q(e);XP(C)::R(J),XB(g)
      • Refutation
        • S(a);XP(C)
  • Actual
    • B(H);P_PINQ(e)
    • Threat
      • R(J),XB(g)
    • Vars
      • S(i);N_GUARD,XS(I)::B(H),XQ(e)
      • R(j);SBLOCK::QAB1(E)
      • R(j);N_GUARD::S(I),XR(j)
      • R(j);N_GUARD,N_SPINB(g)::S(I)
      • B(f);N_GUARD::QAR(E)+P(F)
      • S(a);N_GUARD::P(C),XP(b)
      • S(i);N_GUARD::B(H),XQ(e)
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