MESON Chess Problem Database

Problem Display
PID: 263325 (5R2/2n5/p1BpkP2/P6p/1KP1P3/1Q4B1/b7/8 w - - 0 1)

Myllyniemi, Matti Arvo

3rd HM., Szachy, 1956

5R2/2n5/p1BpkP2/P6p/1KP1P3/1Q4B1/b7/8

#2

9 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5+
      • 2.cxd5#
  • Tries
    • 1.Bh2?
      • threat
        • 2.Qh3#
      • 1...Sd5+
        • 2.cxd5#
      • 1...Bxb3!
    • 1.Bf4?
      • threat
        • 2.Qh3#
      • 1...Sd5+
        • 2.cxd5#
      • 1...Bxb3!
    • 1.Qd1?
      • threat
        • 2.Qxd6#
      • 1...Sd5+
        • 2.Qxd5#
      • 1...Sb5
        • 2.Qd5#
      • 1...Se8
        • 2.Qd5#
      • 1...d5!
    • 1.Qa4?
      • threat
        • 2.Bd7#
      • 1...Sd5+
        • 2.Bxd5#
      • 1...Sb5!
    • 1.Qd3?
      • threat
        • 2.Qxd6#
      • 1...Sd5+
        • 2.Qxd5#
        • 2.exd5#
      • 1...Sb5
        • 2.Qd5#
      • 1...Se8
        • 2.Qd5#
      • 1...d5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qf5#
      • 1...Sd5+
        • 2.exd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(f);CHECK,OGATE::P(D),XS(f)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB(A)
      • Vars
        • S(f);CHECK,OGATE::P(D),XS(f)
      • Refutation
        • B(a);XQ(A)
    • Try
      • B(B);
      • Threat
        • QAB(A)
      • Vars
        • S(f);CHECK,OGATE::P(D),XS(f)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(d)
      • Vars
        • S(f);CHECK,N_GUARD::QAB1(A),XS(f)
        • S(f);N_GUARD::QAB1(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • B(G)
      • Vars
        • S(f);CHECK,N_GUARD::B(G),XS(f)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(d)
      • Vars
        • S(f);N_GUARD::QAB1(A)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • S(f);CHECK,OGATE::P(E),XS(f)
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