MESON Chess Problem Database

Problem Display
PID: 82370 (4R1K1/1P5n/3p1p1B/3N1k1B/8/1qp3p1/Q1b1R3/n7 w - - 0 1)

Ahues, Herbert Siegfried Oskar

idee & form, 1996

4R1K1/1P5n/3p1p1B/3N1k1B/8/1qp3p1/Q1b1R3/n7

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Se3#
      • 2.Se7#
    • 1...Qxd5+
      • 2.Qxd5#
    • 1...Qb1
      • 2.Se3#
      • 2.Se7#
    • 1...Qb2
      • 2.Se3#
      • 2.Se7#
    • 1...Qa3
      • 2.Se3#
      • 2.Se7#
    • 1...Qb4
      • 2.Se3#
      • 2.Se7#
    • 1...Qb5
      • 2.Se3#
      • 2.Se7#
    • 1...Qb6
      • 2.Se7#
    • 1...Qxb7
      • 2.Se3#
    • 1...g2
      • 2.Rf2#
  • Tries
    • 1.Kxh7?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Qb6
        • 2.Se7#
      • 1...Be4
        • 2.Se3#
      • 1...Qxb7+!
    • 1.Kh8?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Qxb7
        • 2.Se3#
      • 1...Qb6
        • 2.Se7#
      • 1...Be4
        • 2.Se3#
      • 1...Sg5!
    • 1.R8e6?
      • threat
        • 2.Se7#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Qxb7
        • 2.Se3#
      • 1...Sg5
        • 2.Rxf6#
      • 1...Be4!
    • 1.Qxc2+?
      • 1...Qxc2
        • 2.Se3#
        • 2.Se7#
      • 1...Sxc2!
    • 1.Qa4?
      • threat
        • 2.Qd7#
        • 2.Qf4#
        • 2.Qg4#
      • 1...Qxa4
        • 2.Se3#
        • 2.Se7#
      • 1...Qxb7
        • 2.Se3#
        • 2.Qf4#
        • 2.Qg4#
      • 1...Sg5
        • 2.Qf4#
        • 2.Qg4#
      • 1...Qc4
        • 2.Qd7#
      • 1...Qb4
        • 2.Se3#
        • 2.Se7#
        • 2.Qd7#
      • 1...Qb5
        • 2.Se3#
        • 2.Se7#
        • 2.Qf4#
        • 2.Qg4#
      • 1...Be4
        • 2.Qd7#
        • 2.Qxe4#
      • 1...Sf8
        • 2.Qf4#
        • 2.Qg4#
      • 1...Qxd5+!
  • Keys
    • 1.R2e6!
      • threat
        • 2.Se3#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Sg5
        • 2.Rxf6#
      • 1...Qb6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(c);CHECK,OGATE,XS(C)::QAR2(A),XQ(c)
    • Q(c);N_PINS(C)::S(C)
    • Q(c);N_PINS(C),XP(F)::S(C)
    • P(e);N_GUARD::R(B)
  • Tries
    • Try
      • K(H);N_SPINS(C),S_FLIGHT,XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);OGATE,XS(C)::QAR2(A),XQ(c)
        • Q(c);::S(C)
        • B(b);::S(C)
      • Refutation
        • Q(c);CHECK,XP(F)
    • Try
      • K(H);N_SPINS(C),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);OGATE,XS(C)::QAR2(A),XQ(c)
        • Q(c);XP(F)::S(C)
        • Q(c);::S(C)
        • B(b);::S(C)
      • Refutation
        • S(i);
    • Try
      • R(G);N_SPINS(C)
      • Threat
        • S(C)
      • Vars
        • Q(c);OGATE,P_PINR(G),XS(C)::QAR2(A),XQ(c)
        • Q(c);XP(F)::S(C)
        • S(i);N_GUARD::R1(G),XP(h)
      • Refutation
        • B(b);
    • Try
      • Q(A);CHECK,XB(b)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);::QAB(A)
      • Refutation
        • Q(c);CHECK,XS(C)
  • Actual
    • R(B);N_SPINS(C)
    • Threat
      • S(C)
    • Vars
      • Q(c);OGATE,P_PINR(B),XS(C)::QAR2(A),XQ(c)
      • S(i);N_GUARD::R1(B),XP(h)
      • Q(c);::S(C)
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