MESON Chess Problem Database

Problem Display
PID: 259200 (5N1B/8/2ppPn2/1prrk1p1/1KpRP3/2p2B2/2P3pP/4Q1N1 w - - 0 1)

Pirrone, Santi

Szachy, 1974

5N1B/8/2ppPn2/1prrk1p1/1KpRP3/2p2B2/2P3pP/4Q1N1

#2

11 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qxc3#
    • 1...Kf4
      • 2.Sg6#
    • 1...Rxd4
      • 2.Qg3#
  • Tries
    • 1.Kxc3?
      • threat
        • 2.Qg3#
      • 1...Kf4
        • 2.Sg6#
      • 1...b4+!
    • 1.Sg6+?
      • 1...Kxd4
        • 2.Qf2#
        • 2.Qxc3#
      • 1...Kxe6!
    • 1.Sd7+?
      • 1...Kxd4
        • 2.Qf2#
        • 2.Qxc3#
      • 1...Kf4
        • 2.Qc1#
      • 1...Kxe6!
    • 1.Bxg2?
      • 1...Kxd4
        • 2.Sf3#
        • 2.Qxc3#
      • 1...Kf4
        • 2.Qg3#
      • 1...Rxd4
        • 2.Qg3#
      • 1...g4!
    • 1.Bxf6+?
      • 1...Kf4
        • 2.Sg6#
        • 2.Qc1#
      • 1...Kxf6!
    • 1.Bg7?
      • 1...Kxd4
        • 2.Qxc3#
      • 1...Kf4
        • 2.Sg6#
      • 1...Rxd4
        • 2.Qg3#
      • 1...g4!
    • 1.Qf2?
      • 1...Kf4
        • 2.Sg6#
      • 1...Rxd4
        • 2.Qg3#
      • 1...g4!
    • 1.Qe3?
      • 1...Rxd4
        • 2.Qxg5#
      • 1...g4!
    • 1.h3?
      • 1...Kxd4
        • 2.Qxc3#
      • 1...Kf4
        • 2.Sg6#
      • 1...Rxd4
        • 2.Qg3#
      • 1...g4!
    • 1.exd5+?
      • 1...Kxd4
        • 2.Bxf6#
        • 2.Qxc3#
        • 2.Qe4#
      • 1...Kf5!
    • 1.e7?
      • 1...Kxd4
        • 2.Qxc3#
      • 1...Kf4
        • 2.Sg6#
      • 1...Rxd4
        • 2.Qg3#
      • 1...g4!
  • Keys
    • 1.Bg4!
      • 1...Kxd4
        • 2.Sf3#
      • 1...Kf4
        • 2.Qg3#
      • 1...Rxd4
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(g);OGATEB,S_FLIGHT,XR(G)::QAB1(A),XP(b)
    • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::S(J)
    • R(f);SBLOCK,XR(G)::QAB(A)
  • Tries
    • Try
      • K(F);S_FLIGHT,XP(b)
      • Threat
        • QAB(A)
      • Vars
        • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::S(J)
      • Refutation
        • P(d);CHECK
    • Try
      • S(J);CHECK
      • Refutation
        • K(g);N_SPINS(k),P-FLIGHT,XP(I)
    • Try
      • S(J);CHECK
      • Vars
        • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::QAB(A)
      • Refutation
        • K(g);N_SPINS(k),P-FLIGHT,XP(I)
    • Try
      • B(E);XP(a)
      • Vars
        • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::QAB1(A)
        • R(f);SBLOCK,XR(G)::QAB(A)
      • Refutation
        • P(h);
    • Try
      • B(K);CHECK,XS(k)
      • Refutation
        • K(g);S_FLIGHT,XB(K)
    • Try
      • B(K);
      • Vars
        • K(g);OGATEB,S_FLIGHT,XR(G)::QAB1(A),XP(b)
        • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::S(J)
        • R(f);SBLOCK,XR(G)::QAB(A)
      • Refutation
        • P(h);
    • Try
      • Q(A);
      • Vars
        • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::S(J)
        • R(f);SBLOCK,XR(G)::QAB(A)
      • Refutation
        • P(h);
    • Try
      • Q(A);
      • Vars
        • R(f);SBLOCK,XR(G)::QAR2(A),XP(h)
      • Refutation
        • P(h);
    • Try
      • P(D);
      • Vars
        • K(g);OGATEB,S_FLIGHT,XR(G)::QAB1(A),XP(b)
        • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::S(J)
        • R(f);SBLOCK,XR(G)::QAB(A)
      • Refutation
        • P(h);
    • Try
      • P(H);CHECK,XR(f)
      • Refutation
        • K(g);N_SPINS(k),P-FLIGHT
    • Try
      • P(I);
      • Vars
        • K(g);OGATEB,S_FLIGHT,XR(G)::QAB1(A),XP(b)
        • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::S(J)
        • R(f);SBLOCK,XR(G)::QAB(A)
      • Refutation
        • P(h);
  • Actual
    • B(E);
    • Vars
      • K(g);N_GUARD,S_FLIGHT,XR(G)::S(B)
      • K(g);N_GUARD,N_SPINS(k),S_FLIGHT::QAB1(A)
      • R(f);SBLOCK,XR(G)::S(J)
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