MESON Chess Problem Database

Problem Display
PID: 225864 (1qB1N3/1P2Rpp1/4R3/1K2b2r/2P1k1P1/4P3/2p1Q1p1/4n3 w - - 0 1)

Pituk, Alexander

Praca, 2001

1qB1N3/1P2Rpp1/4R3/1K2b2r/2P1k1P1/4P3/2p1Q1p1/4n3

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qa7
      • 2.Sd6#
    • 1...Qxb7+
      • 2.Bxb7#
    • 1...Qa8
      • 2.Sd6#
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qxc8
      • 2.Sd6#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Rd6?
      • threat
        • 2.Rd4#
      • 1...Qxb7+
        • 2.Bxb7#
      • 1...Qxd6
        • 2.Sxd6#
      • 1...Sf3
        • 2.Qd3#
      • 1...Qa7!
    • 1.Rd7?
      • threat
        • 2.Rd4#
      • 1...Qxb7+
        • 2.Bxb7#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Qa7
        • 2.Sd6#
      • 1...Sf3
        • 2.Qd3#
      • 1...fxe6!
    • 1.Rxf7?
      • threat
        • 2.Rf4#
      • 1...Qxb7+
        • 2.Bxb7#
      • 1...Sd3
        • 2.Qf3#
      • 1...g5
        • 2.Sf6#
      • 1...Rf5!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rf4#
      • 1...Qxb7+
        • 2.Bxb7#
      • 1...gxf6
        • 2.Sxf6#
      • 1...Rf5
        • 2.Bxf5#
      • 1...Sd3
        • 2.Qf3#
      • 1...g5
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_GUARD,N_PINP(G)::S(J),XQ(i)
    • Q(i);N_GUARD,N_PINP(G)::S(J)
    • Q(i);CHECK,OGATE,XP(G)::B(I),XQ(i)
    • Q(i);N_GUARD,N_PINP(G),XB(I)::S(J)
    • P(h);N_GUARD::S(J)
  • Tries
    • Try
      • R(F);
      • Threat
        • R1(F)
      • Vars
        • Q(i);CHECK,OGATE,XP(G)::B(I),XQ(i)
        • Q(i);N_PINP(G),XR(F)::S(J),XQ(i)
        • S(a);N_GUARD,SBLOCK::QAB1(A)
      • Refutation
        • Q(i);N_PINP(G)
    • Try
      • R(H);
      • Threat
        • R1(H)
      • Vars
        • Q(i);CHECK,OGATE,XP(G)::B(I),XQ(i)
        • Q(i);N_GUARD,N_PINP(G)::S(J),XQ(i)
        • Q(i);N_GUARD,N_PINP(G)::S(J)
        • S(a);N_GUARD,SBLOCK::QAB1(A)
      • Refutation
        • P(g);N_SPINB(e),XR(F)
    • Try
      • R(H);XP(g)
      • Threat
        • R1(H)
      • Vars
        • Q(i);CHECK,OGATE,XP(G)::B(I),XQ(i)
        • S(a);N_GUARD,SBLOCK::QAB1(A)
        • P(h);N_GUARD::S(J)
      • Refutation
        • R(f);
  • Actual
    • R(F);
    • Threat
      • R1(F)
    • Vars
      • Q(i);CHECK,OGATE,XP(G)::B(I),XQ(i)
      • P(h);XR(F)::S(J),XP(h)
      • R(f);N_GUARD::B(I),XR(f)
      • S(a);N_GUARD,SBLOCK::QAB1(A)
      • P(h);S_CUTR(f)::B(I)
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