MESON Chess Problem Database

Problem Display
PID: 287241 (4N3/KR2pp2/1pNp4/pbkp4/3p4/1Q6/8/8 w - - 0 1)

Frak, Marian

Problem Paradise, 2022

4N3/KR2pp2/1pNp4/pbkp4/3p4/1Q6/8/8

#2

5 + 9

15601 Albrecht-Leiss-Degener Collection 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Rc7#
    • 1...Bc4
      • 2.Qxb6#
  • Tries
    • 1.Sxa5?
      • threat
        • 2.Qa3#
      • 1...Bxe8
        • 2.Qxb6#
      • 1...bxa5
        • 2.Qxb5#
      • 1...Bf1
        • 2.Rc7#
        • 2.Qxb6#
      • 1...Be2
        • 2.Rc7#
        • 2.Qxb6#
      • 1...Bd3
        • 2.Rc7#
        • 2.Qxb6#
      • 1...Ba4
        • 2.Qxb6#
      • 1...Bc4
        • 2.Rc7#
        • 2.Qxb6#
      • 1...Ba6
        • 2.Rc7#
        • 2.Qxb6#
      • 1...Bc6
        • 2.Qxb6#
      • 1...Bd7
        • 2.Qxb6#
      • 1...d3!
    • 1.Qa3+?
      • 1...Kxc6
        • 2.Rc7#
      • 1...Kc4!
    • 1.Qb4+?
      • 1...Kxc6
        • 2.Rc7#
      • 1...axb4!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qxd5#
        • 2.Qxb5#
      • 1...Kxc6
        • 2.Qxb5#
      • 1...Bxc6
        • 2.Sa6#
      • 1...Bf1
        • 2.Qxd5#
      • 1...Be2
        • 2.Qxd5#
      • 1...Bd3
        • 2.Qxd5#
      • 1...Ba4
        • 2.Qxd5#
      • 1...Bc4
        • 2.Qxb6#
      • 1...Ba6
        • 2.Qxd5#
      • 1...e6
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,P-FLIGHT,XS(B)::R1(D)
    • B(c);OGATE,SBLOCK::QAB1(A),XP(f)
  • Tries
    • Try
      • S(B);XP(b)
      • Threat
        • QAB(A)
      • Vars
        • B(c);OGATE,XS(E)::QAB1(A),XP(f)
        • P(f);XS(B)::QAR1(A),XB(c)
        • B(c);OGATE::QAB1(A),XP(f)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT,XS(B)::R1(D)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT,S_CUTP(b),XS(B)::R1(D)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • S(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);P-FLIGHT,XS(B)::QAB1(A),XB(c)
      • B(c);N_GUARD,SBLOCK,XS(B)::S(E)
      • B(c);::QAR1(A),XP(e)
      • B(c);OGATE,SBLOCK::QAB1(A),XP(f)
      • P(h);::QAR1(A),XB(c)
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