MESON Chess Problem Database

Problem Display
PID: 222226 (1N1Q4/K2b1P2/1p1p4/2Pk1p2/5R2/p6q/3rR3/4r1B1 w - - 0 1)

Hermanson, Halvar

Suomen Shakki, 1960

1N1Q4/K2b1P2/1p1p4/2Pk1p2/5R2/p6q/3rR3/4r1B1

#2

8 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Qxd6#
    • 1...Bb5
      • 2.Qxd6#
    • 1...Bc6
      • 2.Qxd6#
    • 1...Be6
      • 2.Qxd6#
    • 1...Bc8
      • 2.Qxd6#
    • 1...Be8
      • 2.Qxd6#
    • 1...dxc5
      • 2.Qxd7#
  • Tries
    • 1.Rd4+?
      • 1...Kxc5
        • 2.Qxb6#
      • 1...Rxd4!
    • 1.Qf6?
      • threat
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qe5#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Qh6
        • 2.Rxd2#
      • 1...Be6
        • 2.Qxe6#
      • 1...bxc5!
    • 1.Qxd7?
      • threat
        • 2.Qc6#
        • 2.Qe6#
        • 2.Qxd6#
        • 2.Qb7#
      • 1...Rxg1
        • 2.Qc6#
        • 2.Qxd6#
      • 1...Rexe2
        • 2.Qxd6#
      • 1...Rdxe2
        • 2.Qxd6#
      • 1...bxc5
        • 2.Qc6#
        • 2.Qe6#
        • 2.Qb7#
      • 1...Qe3
        • 2.Qxd6#
      • 1...Qh6
        • 2.Qxf5#
        • 2.Qc6#
        • 2.Qb7#
      • 1...Rd4!
  • Keys
    • 1.Qxb6!
      • threat
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Rd4
        • 2.Rxd4#
      • 1...Qh6
        • 2.Qb3#
      • 1...Bc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(i);OGATE,P_SPINP(h)::QAR1(H),XP(h)
    • P(h);OGATEB,P_SPINB(i),XP(D)::QAR2(H),XB(i)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(D)::QAB1(H),XP(g)
      • Refutation
        • R(b);XR(C)
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XP(h)
      • Vars
        • P(h);N_GUARD,XP(D)::QAR1(H)
        • R(b);N_GUARD::QAR1(H),XR(b)
        • Q(d);N_GUARD::R(B),XR(b)
        • B(i);N_GUARD::QAB1(H),XB(i)
      • Refutation
        • P(g);XP(D)
    • Try
      • Q(H);P_PINP(h),XB(i)
      • Threat
        • DUALS(4)
      • Vars
        • R(a);XR(B)::QAR1(H),XP(h)
        • R(b);XR(B)::QAR1(H),XP(h)
        • Q(d);::QAR1(H),XP(h)
      • Refutation
        • R(b);
  • Actual
    • Q(H);XP(g)
    • Threat
      • QAR1(H),XP(h)
    • Vars
      • P(h);OGATE,XP(D)::QAR1(H),XP(h)
      • R(b);N_GUARD::R1(C),XR(b)
      • Q(d);N_GUARD::QAB(H)
      • B(i);N_GUARD::QAB1(H),XB(i)
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