MESON Chess Problem Database

Problem Display
PID: 109257 (4k2b/3Npp2/5B2/8/3QNK2/7B/6b1/8 w - - 0 1)

Rogoshin, Fyodor Ivanovich

Slovensky Dennik, 1994

4k2b/3Npp2/5B2/8/3QNK2/7B/6b1/8

#2

6 + 5

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e5+
      • 2.Qxe5#
  • Tries
    • 1.Sd6+?
      • 1...Kd8
        • 2.Qb6#
      • 1...exd6!
    • 1.Qc5?
      • threat
        • 2.Qxe7#
        • 2.Qc8#
      • 1...e5+
        • 2.Qxe5#
      • 1...Bxf6
        • 2.Qc8#
      • 1...exf6
        • 2.Qf8#
      • 1...e6
        • 2.Qe7#
        • 2.Qc8#
      • 1...Kd8!
    • 1.Qe5?
      • threat
        • 2.Qb8#
        • 2.Qxe7#
      • 1...Kd8
        • 2.Qb8#
      • 1...Bxh3
        • 2.Qxe7#
      • 1...Bxf6
        • 2.Qb8#
      • 1...e6!
    • 1.Qb4?
      • threat
        • 2.Qxe7#
        • 2.Qb8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Bxh3
        • 2.Qxe7#
      • 1...Bxf6
        • 2.Qb8#
      • 1...exf6
        • 2.Qf8#
      • 1...e6
        • 2.Qe7#
      • 1...e5+!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qxe7#
        • 2.Qb8#
      • 1...e5+
        • 2.Qxe5#
      • 1...Kd8
        • 2.Qb8#
      • 1...Bxh3
        • 2.Qxe7#
      • 1...Bxf6
        • 2.Qb8#
      • 1...exd6
        • 2.Sxd6#
      • 1...exf6
        • 2.Qf8#
      • 1...e6
        • 2.Qe7#

This anticipates 173185(2006)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(b);CHECK,OGATEB::QAR(B),XP(b)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(b)::QAB(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK,OGATEB::QAR(B),XP(b)
        • B(e);XB(E)::QAR2(B)
        • P(b);OGATE,XB(E)::QAR1(B)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAR2(B)
        • B(a);XB(A)::QAR1(B),XP(b)
        • B(e);XB(E)::QAR(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(b)::QAR2(B)
        • B(a);XB(A)::QAR1(B),XP(b)
        • B(e);XB(E)::QAR(B)
        • P(b);OGATE,XB(E)::QAR1(B)
        • P(b);::QAR1(B)
      • Refutation
        • P(b);CHECK
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);CHECK,OGATEB::QAR(B),XP(b)
      • K(d);P-FLIGHT,P_SPINP(b)::QAR2(B)
      • B(a);XB(A)::QAR1(B),XP(b)
      • B(e);XB(E)::QAR(B)
      • P(b);XQ(B)::S(C),XP(b)
      • P(b);OGATE,XB(E)::QAR1(B)
      • P(b);::QAR1(B)
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