MESON Chess Problem Database

Problem Display
PID: 238115 (8/3N4/4pR2/p7/r3kpBr/pQ2p2R/2nB3n/4b2K w - - 0 1)

Hermanson, Halvar

Shakhmaty v SSSR, 1966

8/3N4/4pR2/p7/r3kpBr/pQ2p2R/2nB3n/4b2K

#2

7 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Rxf4#
    • 1...Rd4
      • 2.Rxe6#
    • 1...Sb4
      • 2.Qc4#
    • 1...exd2
      • 2.Qd3#
    • 1...e2
      • 2.Rxf4#
      • 2.Qd3#
  • Tries
    • 1.Bf3+?
      • 1...Kd4
        • 2.Qc3#
      • 1...Sxf3!
    • 1.Bf5+?
      • 1...Kd4
        • 2.Qd3#
      • 1...exf5!
    • 1.Qc4+?
      • 1...Sd4
        • 2.Rxe6#
      • 1...Rxc4!
  • Keys
    • 1.Be2!
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Rd4
        • 2.Qxe6#
      • 1...Sb4
        • 2.Qc4#
      • 1...Sd4
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(g);P-FLIGHT::R(F),XP(h)
    • R(f);SBLOCK::R(F),XP(k)
    • S(b);N_GUARD,S_CUTR(f)::QAR2(C)
    • P(e);XB(B)::QAB1(C)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(g);P-FLIGHT::QAB1(C)
      • Refutation
        • S(c);P_PINR(D),XB(E)
    • Try
      • B(E);CHECK
      • Vars
        • K(g);P-FLIGHT::QAR1(C)
      • Refutation
        • P(k);XB(E)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);P_SPINS(b)::R(F),XP(k)
      • Refutation
        • R(f);XQ(C)
  • Actual
    • B(E);
    • Threat
      • QAB1(C)
    • Vars
      • K(g);P-FLIGHT::QAR1(C)
      • R(f);SBLOCK::QAR2(C),XP(k)
      • S(b);N_GUARD,S_CUTR(f)::QAR2(C)
      • S(b);SBLOCK::B(E)
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