MESON Chess Problem Database

Problem Display
PID: 235560 (1b5K/3Q2P1/B2P4/1Ppk4/1prPp2R/1np2P2/2n5/1b1q1N2 w - - 0 1)

Hannelius, Jan Ingvar

Skakbladet, 1946

1b5K/3Q2P1/B2P4/1Ppk4/1prPp2R/1np2P2/2n5/1b1q1N2

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc7
      • 2.dxc7#
    • 1...exf3
      • 2.Bb7#
      • 2.g8Q#
      • 2.g8B#
    • 1...e3
      • 2.Bb7#
      • 2.g8Q#
      • 2.g8B#
    • 1...cxd4
      • 2.Rh5#
  • Tries
    • 1.Qf5+?
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Kxd6!
    • 1.Qc6+?
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qe6+?
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Kxe6!
    • 1.Qb7+?
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Kxd6
        • 2.Rh6#
      • 1...Ke6!
    • 1.Qf7+?
      • 1...Kxd6
        • 2.Rh6#
      • 1...Kxd4!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Qxd4
        • 2.Bb7#
      • 1...Rxd4
        • 2.g8Q#
        • 2.g8B#
      • 1...Bxd6
        • 2.Qxe4#
      • 1...Scxd4
        • 2.Se3#
      • 1...Sbxd4
        • 2.fxe4#
      • 1...cxd4
        • 2.Rh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(k);OGATE::QAR(H)+P(G),XB(k)
    • P(i);SBLOCK,XP(C)::R(D)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(j);P-FLIGHT,P_SPINP(h),XP(C)::QAR1(H),XP(h)
      • Refutation
        • K(j);P-FLIGHT,XP(G)
    • Try
      • Q(H);CHECK
      • Vars
        • K(j);OGATE,P-FLIGHT,P_SPINP(h),XP(C)::QAR1(H),XP(h)
      • Refutation
        • K(j);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(j);P-FLIGHT,P_SPINP(h),XP(C)::QAR1(H),XP(h)
      • Refutation
        • K(j);S_FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(j);OGATE,P-FLIGHT,P_SPINP(h),XP(C)::QAR1(H),XP(h)
        • K(j);P-FLIGHT,XP(G)::R(D)
      • Refutation
        • K(j);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(j);P-FLIGHT,XP(G)::R(D)
      • Refutation
        • K(j);P-FLIGHT,P_SPINP(h),XP(C)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(j);P-FLIGHT,P_SPINP(h),XP(C)::QAR1(H),XP(h)
      • Q(b);P_PINP(I),SBLOCK,XP(C)::B(F)
      • R(g);SBLOCK,XP(C)::P=Q
      • B(k);SBLOCK,XP(G)::QAB1(H),XP(h)
      • S(c);N_GUARD,SBLOCK,XP(C)::S(A)
      • S(d);SBLOCK,XP(C)::P(B),XP(h)
      • P(i);SBLOCK,XP(C)::R(D)
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