MESON Chess Problem Database

Problem Display
PID: 238294 (4RR1n/b2n1q2/4N3/4Pk1B/5p1P/4pQ1b/KB2Pr2/5Nr1 w - - 0 1)

Segers, Marcel

Skakbladet, 1935

4RR1n/b2n1q2/4N3/4Pk1B/5p1P/4pQ1b/KB2Pr2/5Nr1

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sg3#
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rxe2
      • 2.Qxf4#
    • 1...Rg2
      • 2.Qxf4#
    • 1...Rh2
      • 2.Qxf4#
    • 1...Bg2
      • 2.Sg3#
    • 1...Bb8
      • 2.Sxe3#
    • 1...Sc5
      • 2.Sxe3#
    • 1...Sb6
      • 2.Sxe3#
  • Tries
    • 1.Rxf7+?
      • 1...Sf6
        • 2.Rxf6#
      • 1...Sxf7!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qd3#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Bg2
        • 2.Sg7#
      • 1...Bd4
        • 2.Sxd4#
      • 1...Sc5
        • 2.Sd4#
      • 1...Sf6
        • 2.exf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::S(A)
    • R(a);N_GUARD::S(A),XR(a)
    • R(b);N_GUARD,P_PINB(C),XP(D)::QAR1(E),XP(e)
    • R(b);N_GUARD::QAR1(E),XP(e)
    • B(d);S_CUTR(a)::S(A)
    • B(g);N_GUARD::S(A),XP(c)
    • S(h);S_CUTB(g)::S(A),XP(c)
  • Tries
    • Try
      • R(K);CHECK,N_SPINS(I),XQ(i)
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::R1(K),XS(h)
      • Refutation
        • S(j);XR(K)
  • Actual
    • Q(E);N_PINP(e),N_SPINS(I)
    • Threat
      • QAB(E)
    • Vars
      • S(h);OGATE,P_SPINS(h),XP(G)::QAR1(E),XS(h)
      • B(d);S_CUTR(a)::S(I)
      • B(g);N_GUARD::S(I),XB(g)
      • S(h);S_CUTB(g)::S(I)
      • S(h);N_SPINQ(i),OGATE::QAR(E)+P(G),XS(h)
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Developed and maintained by Brian Stephenson.
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