MESON Chess Problem Database

Problem Display
PID: 81020 (8/8/6pB/3pQ1pq/3p2k1/3R4/3pR1Np/1K1Nbrrb w - - 0 1)

Savournin, Jacques

4th Prize, Smer, 1963

8/8/6pB/3pQ1pq/3p2k1/3R4/3pR1Np/1K1Nbrrb

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Qxg5#
    • 1...Rf2
      • 2.Rg3#
    • 1...Bf2
      • 2.Qe6#
    • 1...Bg3
      • 2.Rxg3#
  • Tries
    • 1.Sf2+?
      • 1...Rxf2
        • 2.Rg3#
      • 1...Bxf2+!
    • 1.Re4+?
      • 1...Rf4
        • 2.Qe6#
      • 1...dxe4!
  • Keys
    • 1.Rf2!
      • threat
        • 2.Rg3#
        • 2.Qg3#
        • 2.Qxd4#
        • 2.Qe2#
        • 2.Qe6#
      • 1...Qxh6
        • 2.Qe2#
      • 1...Rxf2
        • 2.Rg3#
      • 1...Rxg2
        • 2.Qxd4#
      • 1...Bxf2
        • 2.Qe6#
      • 1...Bxg2
        • 2.Qg3#
      • 1...Qh3
        • 2.Qxg5#
      • 1...Qh4
        • 2.Qe2#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(k);N_GUARD::QAR1(F),XP(j)
    • R(b);S_CUTB(a)::R1(E)
    • B(a);P_PINS(B),S_CUTR(b)::QAB(F)
    • B(a);N_GUARD,P_PINS(B)::R1(E),XB(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(b);XS(B)::R1(E)
      • Refutation
        • B(a);CHECK,XS(B)
    • Try
      • R(C);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB(F)
      • Refutation
        • P(i);XR(C)
  • Actual
    • R(C);
    • Threat
      • DUALS(5)
    • Vars
      • Q(k);XB(G)::QAB(F)
      • R(b);XR(C)::R1(E)
      • R(c);XS(D)::QAR(F),XP(g)
      • B(a);P_PINS(B),XR(C)::QAB(F)
      • B(d);XS(D)::QAR1(F)
      • Q(k);N_GUARD::QAR1(F),XP(j)
      • Q(k);::QAB(F)
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Developed and maintained by Brian Stephenson.
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