MESON Chess Problem Database

Problem Display
PID: 234014 (8/8/2b3pK/6Rp/5k1p/7Q/6p1/1B2rnN1 w - - 0 1)

Hermanson, Halvar

Il Due Mosse, 1960

8/8/2b3pK/6Rp/5k1p/7Q/6p1/1B2rnN1

#2

5 + 8

15148 Sadier Collection 2021
3713 Snap 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Se2#
    • 1...Rd1
      • 2.Se2#
    • 1...Re2
      • 2.Sxe2#
    • 1...Re3
      • 2.Qxh4#
    • 1...Re4
      • 2.Qf3#
    • 1...Bf3
      • 2.Qxf3#
    • 1...Ba4
      • 2.Qf3#
    • 1...Bb5
      • 2.Qf3#
    • 1...Bd7
      • 2.Qf3#
    • 1...Be8
      • 2.Qf3#
    • 1...Se3
      • 2.Qh2#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Sh3#
      • 1...Re3
        • 2.Qf8#
      • 1...Bd7
        • 2.Qf3#
      • 1...Se3
        • 2.Qd6#
      • 1...h3
        • 2.Sxh3#
      • 1...Rxb1!
    • 1.Qb3?
      • threat
        • 2.Sh3#
      • 1...Re3
        • 2.Qf7#
      • 1...Bd7
        • 2.Qf3#
      • 1...Se3
        • 2.Qb8#
      • 1...h3
        • 2.Sxh3#
      • 1...Rxb1!
    • 1.Qd3?
      • threat
        • 2.Sh3#
      • 1...Bd7
        • 2.Qf3#
      • 1...Se3
        • 2.Qd6#
      • 1...h3
        • 2.Sxh3#
      • 1...Re3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Sh3#
      • 1...Rxb1
        • 2.Qe5#
      • 1...Re3
        • 2.Qf6#
      • 1...Bd7
        • 2.Qf3#
      • 1...Se3
        • 2.Qe5#
      • 1...h3
        • 2.Sxh3#

This anticipates 276364(1960)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::S(B)
    • R(a);N_GUARD::S(B),XR(a)
    • R(a);SBLOCK::QAR2(C),XP(e)
    • R(a);S_CUTB(g)::QAR1(C)
    • B(g);N_GUARD::QAR1(C),XB(g)
    • B(g);N_GUARD::QAR1(C)
    • S(b);N_GUARD,SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • R(a);SBLOCK::QAR(C)
        • B(g);N_GUARD::QAR1(C)
        • S(b);SBLOCK,S_CUTR(a)::QAB(C)
        • P(e);::S(B),XP(e)
      • Refutation
        • R(a);XB(A)
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • R(a);SBLOCK::QAR(C)
        • B(g);N_GUARD::QAR1(C)
        • S(b);SBLOCK,S_CUTR(a)::QAB(C)
        • P(e);::S(B),XP(e)
      • Refutation
        • R(a);XB(A)
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • B(g);N_GUARD::QAR1(C)
        • S(b);SBLOCK,S_CUTR(a)::QAB(C)
        • P(e);::S(B),XP(e)
      • Refutation
        • R(a);
  • Actual
    • Q(C);
    • Threat
      • S(B)
    • Vars
      • R(a);N_GUARD,XB(A)::QAB1(C)
      • R(a);SBLOCK::QAR2(C)
      • B(g);N_GUARD::QAR1(C)
      • S(b);S_CUTR(a)::QAB1(C)
      • P(e);::S(B),XP(e)
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