MESON Chess Problem Database

Problem Display
PID: 262099 (4n2Q/3p1R1R/1Pbk2p1/r2P4/1P1Nr1p1/4N3/p6b/K6B w - - 0 1)

Somma, Francesco

Schweizerische Schachzeitung, 1930

4n2Q/3p1R1R/1Pbk2p1/r2P4/1P1Nr1p1/4N3/p6b/K6B

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sc4#
    • 1...Re5
      • 2.Sc4#
    • 1...Re6
      • 2.Sc4#
    • 1...Re7
      • 2.Sc4#
    • 1...Rxd5
      • 2.Sc4#
    • 1...Be5
      • 2.Qf8#
    • 1...Bxd5
      • 2.Rxd7#
    • 1...Bb7
      • 2.Rxd7#
    • 1...Ba8
      • 2.Rxd7#
    • 1...Sf6
      • 2.Qb8#
    • 1...Sg7
      • 2.Qb8#
    • 1...g5
      • 2.Sdf5#
  • Tries
    • 1.Rf6+?
      • 1...Re6
        • 2.Sc4#
      • 1...Sxf6
        • 2.Qb8#
      • 1...Ke5!
    • 1.Qf6+?
      • 1...Re6
        • 2.Sc4#
      • 1...Sxf6!
    • 1.Qf8+?
      • 1...Re7
        • 2.Sc4#
        • 2.Qxe7#
      • 1...Ke5!
  • Keys
    • 1.Rh6!
      • threat
        • 2.Sdf5#
      • 1...Rxd4
        • 2.Sf5#
      • 1...Rxd5
        • 2.Sc4#
      • 1...Bxd5
        • 2.Sef5#
      • 1...Sf6
        • 2.Qb8#
      • 1...Sg7
        • 2.Qb8#
      • 1...Rf4
        • 2.Sc4#
      • 1...Re5
        • 2.Sc4#
      • 1...Re6
        • 2.Sc4#
      • 1...Be5
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(c);::S(C)
    • R(e);SBLOCK,XP(F)::S(C)
    • B(b);P_PINS(E),SBLOCK,S_CUTR(c)::QAB(J)
    • B(f);N_GUARD,XP(F)::R1(H),XP(i)
    • B(f);N_GUARD::R1(H),XP(i)
    • S(j);OGATE::QAB(J)
    • P(h);N_GUARD::S(E)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • R(c);P_SPINR(c)::S(C)
        • S(j);OGATE,XR(H)::QAB(J)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Vars
        • R(c);P_SPINR(c)::S(C)
      • Refutation
        • S(j);XQ(J)
    • Try
      • Q(J);CHECK
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • R(I);P_PINP(h)
    • Threat
      • S(E)
    • Vars
      • R(c);XS(E)::S(C)
      • R(e);SBLOCK,XP(F)::S(C)
      • B(f);SBLOCK,XP(F)::S(C)
      • S(j);N_SPINP(h),OGATE::QAB(J)
      • S(j);OGATE::QAB(J)
      • R(c);::S(C)
      • R(c);N_SPINP(h)::S(C)
      • B(b);P_PINS(E),SBLOCK,S_CUTR(c)::QAB(J)
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