MESON Chess Problem Database

Problem Display
PID: 134437 (5N2/8/2r5/r6k/7p/2n4K/7n/2B3Q1 w - - 0 1)

Nesic, Milivoj S

Lud, 1965

5N2/8/2r5/r6k/7p/2n4K/7n/2B3Q1

#2

4 + 6

14620 Sunningdale Machine Gun Solving 2010
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qg5#
    • 1...Ra2
      • 2.Qg5#
    • 1...Ra3
      • 2.Qg5#
    • 1...Ra4
      • 2.Qg5#
    • 1...Rg5
      • 2.Qxg5#
    • 1...Raa6
      • 2.Qg5#
    • 1...Ra7
      • 2.Qg5#
    • 1...Ra8
      • 2.Qg5#
    • 1...Rc4
      • 2.Qg6#
    • 1...Rc5
      • 2.Qg6#
    • 1...Rg6
      • 2.Qxg6#
    • 1...Rc7
      • 2.Qg6#
    • 1...Rc8
      • 2.Qg6#
    • 1...Sf1
      • 2.Qg4#
    • 1...Sf3
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sb5
      • 2.Qg5#
    • 1...Sd5
      • 2.Qg5#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qxh4#
      • 1...Ra4
        • 2.Qe5#
      • 1...Rc4
        • 2.Qh8#
      • 1...Sf3
        • 2.Qg4#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Se4!
    • 1.Qe1?
      • threat
        • 2.Qxh4#
      • 1...Ra4
        • 2.Qe5#
      • 1...Rc4
        • 2.Qe8#
      • 1...Sf3!
    • 1.Qg3?
      • threat
        • 2.Qxh4#
      • 1...Ra4
        • 2.Qe5#
        • 2.Qg5#
      • 1...Rc4
        • 2.Qg6#
      • 1...Sf3
        • 2.Qxf3#
        • 2.Qg4#
      • 1...hxg3!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qxh4#
      • 1...Ra4
        • 2.Qf5#
      • 1...Rc4
        • 2.Qf7#
      • 1...Sf3
        • 2.Qxf3#

This anticipates 238124(1972)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 15
  • Sets
    • R(d);N_GUARD::QAR1(B)
    • R(d);N_GUARD::QAR1(B),XR(d)
    • R(d);N_GUARD,SBLOCK::QAR1(B)
    • R(f);N_GUARD::QAB1(B)
    • R(f);N_GUARD::QAB1(B),XR(f)
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • S(b);S_CUTR(d)::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • R(d);N_GUARD::QAR(B)
        • R(f);N_GUARD::QAR(B)
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • S(b);
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • R(d);N_GUARD::QAR(B)
        • R(f);N_GUARD::QAB(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • R(f);N_GUARD::QAB1(B)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(c)
    • Vars
      • R(d);N_GUARD::QAR2(B)
      • R(f);N_GUARD::QAB(B)
      • S(a);N_GUARD::QAB(B),XS(a)
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