MESON Chess Problem Database

Problem Display
PID: 261433 (K7/4nRQ1/1p1n4/1pkP4/1R6/P2p4/B3pqrB/N7 w - - 0 1)

Garofalo, Antonio

Parrinello, Mario

Neue Zurcher Zeitung, 2002

K7/4nRQ1/1p1n4/1pkP4/1R6/P2p4/B3pqrB/N7

#2

9 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qd4#
    • 1...Qg3
      • 2.Qd4#
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qf1
      • 2.Qd4#
    • 1...Qf3
      • 2.Qd4#
    • 1...Qf5
      • 2.Qd4#
    • 1...Qxf7
      • 2.Qd4#
    • 1...Sdf5
      • 2.Qc3#
    • 1...Sb7
      • 2.Qc3#
    • 1...Sxf7
      • 2.Qc3#
    • 1...Sdc8
      • 2.Qc3#
    • 1...Se8
      • 2.Qc3#
    • 1...Sef5
      • 2.Rc7#
    • 1...Sg6
      • 2.Rc7#
    • 1...Sec8
      • 2.Rc7#
    • 1...Sg8
      • 2.Rc7#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Sb3#
        • 2.Qxd6#
      • 1...Rxh2
        • 2.Sb3#
      • 1...Sxf7
        • 2.Sb3#
        • 2.Qc3#
      • 1...Sxd5
        • 2.Rc7#
        • 2.Qxd6#
        • 2.Qxd5#
      • 1...Qg3
        • 2.Sb3#
        • 2.Qd4#
      • 1...Qf4
        • 2.Sb3#
      • 1...Qf6
        • 2.Sb3#
      • 1...Rg3
        • 2.Sb3#
      • 1...Rg6
        • 2.Sb3#
      • 1...Sc4
        • 2.Sb3#
      • 1...Se4
        • 2.Sb3#
      • 1...Sdf5
        • 2.Sb3#
        • 2.Qc3#
      • 1...Sb7
        • 2.Sb3#
        • 2.Qc3#
      • 1...Sdc8
        • 2.Sb3#
        • 2.Qc3#
      • 1...Se8
        • 2.Sb3#
        • 2.Qc3#
      • 1...Sef5
        • 2.Sb3#
        • 2.Rc7#
      • 1...Sec8
        • 2.Sb3#
        • 2.Rc7#
      • 1...Rg8+!
    • 1.Qg5?
      • threat
        • 2.Sb3#
      • 1...Sxd5
        • 2.Rc7#
        • 2.Qxd5#
      • 1...Qf5
        • 2.Qe3#
      • 1...Sdf5
        • 2.Qc1#
      • 1...Sef5
        • 2.Rc7#
      • 1...Rxg5!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Sb3#
      • 1...Qxf5
        • 2.Qd4#
      • 1...Sdxf5
        • 2.Qc3#
      • 1...Sxd5
        • 2.Qc7#
      • 1...Sexf5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 13
  • Sets
    • Q(b);N_GUARD::QAB1(H)
    • Q(b);N_GUARD::QAB1(H),XQ(b)
    • Q(b);N_GUARD,P_PINP(F)::QAB1(H)
    • Q(b);N_GUARD,XR(G)::QAB1(H)
    • S(h);N_GUARD::QAR2(H)
    • S(h);N_GUARD,XR(G)::QAR2(H)
    • S(i);OGATE::R(G)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XB(C)::S(A)
        • Q(b);::S(A)
        • R(c);::S(A)
        • S(h);::S(A)
      • Refutation
        • R(c);CHECK
    • Try
      • Q(H);
      • Threat
        • S(A)
      • Vars
        • Q(b);N_GUARD::QAB(H)
        • S(h);N_GUARD::QAR(H)
        • S(i);OGATE::R(G)
      • Refutation
        • R(c);XQ(H)
  • Actual
    • R(G);
    • Threat
      • S(A)
    • Vars
      • Q(b);N_GUARD,XR(G)::QAB1(H)
      • S(h);N_GUARD,XR(G)::QAR2(H)
      • S(i);OGATE,P_SPINS(i),XP(F)::QAR2(H)
      • S(i);OGATE,XR(G)::QAR2(H)
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