MESON Chess Problem Database

Problem Display
PID: 259321 (2R1Q2r/3n2q1/1p2p3/1K1kPR2/8/2b4r/4N3/1B2n2b w - - 0 1)

Pirrone, Santi

L'Italia Scacchistica, 1959

2R1Q2r/3n2q1/1p2p3/1K1kPR2/8/2b4r/4N3/1B2n2b

#2

7 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Qxd7#
    • 1...Qf6
      • 2.Qxd7#
    • 1...Qh6
      • 2.Qxd7#
    • 1...Qg1
      • 2.Qxd7#
    • 1...Qg2
      • 2.Qxd7#
    • 1...Qg3
      • 2.Qxd7#
    • 1...Qg4
      • 2.Qxd7#
    • 1...Qg5
      • 2.Qxd7#
    • 1...Qg6
      • 2.Qxd7#
    • 1...Qg8
      • 2.Qxd7#
    • 1...Be4
      • 2.Ba2#
    • 1...Bd4
      • 2.Sf4#
    • 1...Sc5
      • 2.Qc6#
    • 1...Sxe5
      • 2.Qc6#
    • 1...Sf6
      • 2.Qc6#
    • 1...Sf8
      • 2.Qc6#
  • Tries
    • 1.Rc5+?
      • 1...Sxc5
        • 2.Qc6#
      • 1...bxc5!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Sf4#
      • 1...Qxe5
        • 2.Qxd7#
      • 1...Bxe5
        • 2.Rd4#
      • 1...Sxe5
        • 2.Qc6#
      • 1...Qh6
        • 2.Qxd7#
      • 1...Qg3
        • 2.Qxd7#
      • 1...Qg4
        • 2.Qxd7#
      • 1...Qg5
        • 2.Qxd7#
      • 1...Rf3
        • 2.Be4#
      • 1...R3h4
        • 2.Sxc3#
      • 1...R8h4
        • 2.Qa8#
      • 1...Bd2
        • 2.Rd4#
      • 1...Sg2
        • 2.Be4#
      • 1...Sd3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 10
  • Sets
    • Q(i);N_GUARD,P_SPINQ(i),XP(D)::QAR2(G),XS(h)
    • Q(i);N_GUARD::QAR2(G),XS(h)
    • B(b);SBLOCK::B(A)
    • B(c);SBLOCK::S(B)
    • S(h);OGATE::QAB1(G)
    • S(h);OGATE,P_SPINS(h),XP(D)::QAB1(G)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • S(h);OGATE,XR(F)::QAB1(G)
      • Refutation
        • P(f);XR(F)
  • Actual
    • R(F);
    • Threat
      • S(B)
    • Vars
      • Q(i);N_GUARD,P_SPINQ(i),XP(D)::QAR2(G),XS(h)
      • B(c);N_GUARD,P_SPINB(c),XP(D)::R1(F)
      • S(h);OGATE,P_SPINS(h),XP(D)::QAB1(G)
      • Q(i);N_GUARD::QAR2(G),XS(h)
      • R(d);S_CUTB(b)::B(A)
      • R(d);N_GUARD::S(B),XB(c)
      • R(j);N_GUARD::QAB(G)
      • B(c);N_GUARD::R1(F)
      • S(a);S_CUTB(b)::B(A)
      • S(a);S_CUTR(d)::S(B),XB(c)
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