MESON Chess Problem Database

Problem Display
PID: 263931 (4Nn2/B7/pPp2Npb/2kbRp1R/1rP1p3/1pQ1p3/8/7K w - - 0 1)

Foschini, Ettore

3rd Prize, Parallele 50, 1948

4Nn2/B7/pPp2Npb/2kbRp1R/1rP1p3/1pQ1p3/8/7K

#2

9 + 12

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.b7#
    • 1...Rb5
      • 2.cxd5#
    • 1...Se6
      • 2.Sd7#
    • 1...Sd7
      • 2.Sxd7#
    • 1...Sh7
      • 2.Sd7#
    • 1...f4
      • 2.Sxe4#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sb7#
      • 1...Kxd6
        • 2.c5#
      • 1...Rxc4!
    • 1.Qxe3+?
      • 1...Kxc4
        • 2.Sd6#
      • 1...Bxe3!
    • 1.cxd5+?
      • 1...Rc4
        • 2.d6#
      • 1...Kb5!
  • Keys
    • 1.Rxe4!
      • threat
        • 2.Qd4#
      • 1...Bxe4+
        • 2.Sxe4#
      • 1...Rxc4
        • 2.Qa5#
      • 1...Rxb6
        • 2.Qa5#
      • 1...Bxc4
        • 2.Re5#
      • 1...fxe4
        • 2.Sxe4#
      • 1...Ra4
        • 2.b7#
      • 1...Rb5
        • 2.cxd5#
      • 1...Se6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::B(H)+P(F)
    • R(c);N_GUARD,SBLOCK::QAR(B)+P(C),XB(f)
    • S(l);N_GUARD::S(G)
    • S(l);N_GUARD::S(G),XS(l)
    • P(g);N_GUARD::S(G),XP(d)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • K(e);N_SPINB(f),OGATE,S_FLIGHT,XS(I)::P(C)
      • Refutation
        • R(c);P_SPINR(c),XP(C)
    • Try
      • Q(B);CHECK,XP(b)
      • Vars
        • K(e);N_GUARD,N_SPINB(f),P-FLIGHT,S_CUTB(k),XP(C)::S(I)
      • Refutation
        • B(k);XQ(B)
    • Try
      • P(C);CHECK,XB(f)
      • Vars
        • R(c);P_SPINR(c)::R(D)+P(C)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • R(D);N_PINB(f),P_SPINR(D),XP(d)
    • Threat
      • QAB1(B)
    • Vars
      • B(f);CHECK,P_SPINP(g),XR(D)::S(G),XB(f)
      • R(c);OGATE,P_SPINR(c),XP(C)::QAR2(B)
      • R(c);OGATE,P_SPINR(c),XP(F)::QAR2(B)
      • B(f);N_PINR(D),P_SPINB(f),P_SPINP(g),XP(C)::R(D)
      • P(g);P_SPINB(f),XR(D)::S(G),XP(g)
      • R(c);N_GUARD::B(H)+P(F)
      • R(c);N_GUARD,SBLOCK::QAR(B)+P(C),XB(f)
      • S(l);N_GUARD::S(G)
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