MESON Chess Problem Database

Problem Display
PID: 243323 (3qr3/1P1p4/6R1/r3k1p1/pN2n3/K6Q/6B1/2BR2b1 w - - 0 1)

Andersson, Sven Tore

Skakbladet, 1962

3qr3/1P1p4/6R1/r3k1p1/pN2n3/K6Q/6B1/2BR2b1

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Rxd5#
    • 1...Ra6
      • 2.Rd5#
    • 1...Ra7
      • 2.Rd5#
    • 1...Ra8
      • 2.Rd5#
    • 1...Bc5
      • 2.Rd5#
    • 1...Sc5
      • 2.Rd5#
    • 1...Sf6
      • 2.Rxg5#
    • 1...d5
      • 2.Sc6#
    • 1...d6
      • 2.Sc6#
  • Tries
    • 1.Bf4+?
      • 1...Kxf4
        • 2.Sd3#
      • 1...gxf4!
    • 1.b8Q+?
      • 1...Qc7
        • 2.Qxe8#
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6
        • 2.Sc6#
      • 1...Qxb8!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxe4#
      • 1...Sd2
        • 2.Sd3#
      • 1...Sf2
        • 2.Bb2#
      • 1...Sc3
        • 2.Sd3#
      • 1...Sg3
        • 2.Sd3#
      • 1...Sc5
        • 2.Rd5#
      • 1...Sd6
        • 2.Sd3#
      • 1...Sf6
        • 2.Rxg5#
      • 1...d5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(d);N_GUARD::R1(B),XR(d)
    • R(d);N_GUARD::R1(B)
    • B(a);P_PINS(F),S_CUTR(d)::R1(B)
    • S(c);S_CUTR(d)::R1(B)
    • S(c);N_GUARD,SBLOCK,S_CUTQ(h)::R(G),XP(f)
    • P(g);N_GUARD::S(F)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(e);S_FLIGHT,XB(A)::S(F)
      • Refutation
        • P(f);XB(A)
    • Try
      • P(H);CHECK
      • Vars
        • Q(h);OGATE,P_SPINQ(h)::QAR(H),XR(i)
        • S(c);N_GUARD,P_SPINS(c)::QAB1(H),XS(c)
        • P(g);P_SPINP(g)::S(F)
      • Refutation
        • Q(h);XQ(H)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XS(c)
    • Vars
      • S(c);::S(F)
      • S(c);N_GUARD,S_CUTB(a)::B(A)
      • S(c);S_CUTR(d)::R1(B)
      • S(c);N_GUARD,SBLOCK,S_CUTQ(h)::R(G),XP(f)
      • P(g);N_GUARD::S(F)
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Developed and maintained by Brian Stephenson.
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