MESON Chess Problem Database

Problem Display
PID: 71245 (3n1B2/4Rp1K/3k1N2/N1p1n3/bP2p3/b3P3/1p1rQ2p/2rR3q w - - 0 1)

Pagniez, Robert

Le Probleme, 1947

3n1B2/4Rp1K/3k1N2/N1p1n3/bP2p3/b3P3/1p1rQ2p/2rR3q

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Rxd5#
    • 1...Sg4
      • 2.Rxd2#
      • 2.Qxd2#
    • 1...Sg6
      • 2.Rxd2#
      • 2.Qxd2#
    • 1...Sc6
      • 2.Sb7#
    • 1...Se6
      • 2.Rd7#
  • Tries
    • 1.Sb7+?
      • 1...Kc6
        • 2.Qa6#
      • 1...Sxb7!
    • 1.Qa6+?
      • 1...Sec6
        • 2.Rxd2#
      • 1...Sdc6
        • 2.Sb7#
      • 1...Bc6!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qxe5#
      • 1...Sd7
        • 2.Se8#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sf3
        • 2.Sxe4#
      • 1...Sc4
        • 2.Qxc5#
      • 1...Sg4
        • 2.Rxd2#
      • 1...Sec6
        • 2.Se8#
      • 1...Sg6
        • 2.Rxd2#
      • 1...Sdc6
        • 2.Sb7#
      • 1...Se6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(d);OGATE::R1(A),XR(d)
    • S(m);N_GUARD,SBLOCK::S(E)
    • S(m);SBLOCK::B(I)+R(G),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(k);N_SPINR(d),P-FLIGHT::QAR2(B)
      • Refutation
        • S(m);XS(E)
    • Try
      • Q(B);CHECK
      • Vars
        • S(j);P_SPINS(j)::R(A),XR(d)
        • S(m);P_SPINS(m)::S(E)
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XS(j)
    • Vars
      • S(j);S_CUTB(g)::S(F)
      • S(j);N_SPINR(d),OGATE::QAR1(B)
      • S(j);S_CUTQ(b)::S(F),XP(h)
      • S(j);OGATE::QAB1(B),XP(i)
      • S(j);N_GUARD::R(A),XR(d)
      • S(m);N_GUARD,SBLOCK::S(E)
      • S(m);SBLOCK::B(I)+R(G),DCHECK
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Developed and maintained by Brian Stephenson.
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