MESON Chess Problem Database

Problem Display
PID: 245693 (1K2B3/p1pNP3/2k1p3/1p1p1N2/r7/2P5/Q7/R2R3b w - - 0 1)

Wirtanen, Erkki Aukusti

Parallele 50, 1949

1K2B3/p1pNP3/2k1p3/1p1p1N2/r7/2P5/Q7/R2R3b

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qa6#
    • 1...Rc4
      • 2.Qa6#
    • 1...Rd4
      • 2.Qa6#
    • 1...Re4
      • 2.Qa6#
    • 1...Rf4
      • 2.Qa6#
    • 1...Rg4
      • 2.Qa6#
    • 1...Rh4
      • 2.Qa6#
    • 1...Ra6
      • 2.Qxa6#
    • 1...b4
      • 2.Qxa4#
    • 1...d4
      • 2.Qxe6#
  • Tries
    • 1.Sd4+?
      • 1...Rxd4
        • 2.Qa6#
      • 1...Kd6!
    • 1.Qf2?
      • threat
        • 2.Se5#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sf8#
        • 2.Qc5#
      • 1...exf5
        • 2.Qc5#
      • 1...Rc4
        • 2.Se5#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sf8#
        • 2.Ra6#
      • 1...Rd4
        • 2.Ra6#
      • 1...e5
        • 2.Sxe5#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sf8#
        • 2.Qc5#
      • 1...d4!
    • 1.Qa3?
      • threat
        • 2.Qc5#
      • 1...b4
        • 2.Qxa4#
      • 1...Rb4
        • 2.Qa6#
      • 1...Rc4
        • 2.Qa6#
      • 1...Rxa3!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qxc7#
      • 1...b4
        • 2.Sd4#
      • 1...d4
        • 2.Qxh1#
      • 1...Rf4
        • 2.Ra6#
      • 1...e5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(b);OGATE::QAR2(C)
    • R(b);OGATE::QAR2(C),XR(b)
    • P(c);OGATEB::QAB(C),XR(b)
    • P(d);OGATE::QAR2(C),XP(f)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(b);OGATE,XS(E)::QAR2(C)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(5)
      • Vars
        • P(f);XS(E)::QAR1(C)
        • R(b);OGATE::R(A)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(c);OGATEB::QAB(C),XR(b)
        • R(b);OGATE::QAR2(C)
      • Refutation
        • R(b);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(h)
    • Vars
      • P(c);S_CUTR(b)::S(E)
      • P(d);OGATEB::QAB(C),XB(a)
      • R(b);OGATE::R(A)
      • P(f);OGATEB::QAR(C)
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