MESON Chess Problem Database

Problem Display
PID: 5989 (8/8/4K2p/7N/3pk2p/2pr1b1R/2P5/6Q1 w - - 0 1)

Akerblom, Johan Axel

Chemnitzer Wochenschach (Allgemeine Zeitung Chemnitz), 1926

8/8/4K2p/7N/3pk2p/2pr1b1R/2P5/6Q1

#2

5 + 7

3310 2345 Chess Problems 1997
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Qg6#
    • 1...Bd1
      • 2.Qg6#
      • 2.cxd3#
    • 1...Bh1
      • 2.Qg4#
      • 2.Qg6#
      • 2.cxd3#
    • 1...Be2
      • 2.Qg6#
    • 1...Bg2
      • 2.cxd3#
    • 1...Bg4+
      • 2.Qxg4#
  • Tries
    • 1.Qe1+?
      • 1...Be2
        • 2.cxd3#
      • 1...Re3!
    • 1.Qg2?
      • 1...Bxg2
        • 2.cxd3#
      • 1...Re3
        • 2.Rxh4#
        • 2.Qg6#
      • 1...Rd1
        • 2.Qxf3#
      • 1...Rd2
        • 2.Qxf3#
      • 1...Ke3!
    • 1.Qg3?
      • threat
        • 2.Qf4#
        • 2.Qe5#
      • 1...Bg4+
        • 2.Qxg4#
      • 1...Ke3
        • 2.Qe1#
      • 1...Bxh5
        • 2.Qe5#
        • 2.cxd3#
      • 1...hxg3!
    • 1.Qg5?
      • threat
        • 2.Sf6#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Bg4+
        • 2.Qxg4#
      • 1...Bxh5
        • 2.Qe5#
        • 2.Qf5#
        • 2.cxd3#
      • 1...hxg5!
    • 1.Qg7?
      • threat
        • 2.Qe5#
      • 1...Bg4+
        • 2.Qxg4#
      • 1...Ke3!
  • Keys
    • 1.Qh1!
      • 1...Ke3
        • 2.Qe1#
      • 1...Bxh1
        • 2.cxd3#
      • 1...Re3
        • 2.Rxh4#
      • 1...Rd1
        • 2.Qxf3#
      • 1...Rd2
        • 2.Qxf3#
      • 1...Bg2
        • 2.cxd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(b);SBLOCK::QAB(A)
    • B(c);::QAB(A)
    • B(c);::P(B),XR(b)
    • B(c);CHECK,N_GUARD::QAR2(A),XB(c)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(c);P_SPINB(c)::P(B),XR(b)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(A);P_PINB(c)
      • Vars
        • B(c);N_SPINB(c),XQ(A)::P(B),XR(b)
        • R(b);N_GUARD::QAB1(A),XB(c)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);CHECK,N_GUARD::QAR2(A),XB(c)
        • K(e);P-FLIGHT,P_SPINB(c)::QAR2(A)
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(c);CHECK,N_GUARD::QAR2(A),XB(c)
      • Refutation
        • P(g);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(c);CHECK,N_GUARD::QAR2(A),XB(c)
      • Refutation
        • K(e);P-FLIGHT,P_SPINB(c)
  • Actual
    • Q(A);P_PINB(c)
    • Vars
      • K(e);P-FLIGHT::QAR2(A)
      • B(c);N_SPINB(c),XQ(A)::P(B),XR(b)
      • R(b);SBLOCK::R(C),XP(f)
      • R(b);N_GUARD::QAB1(A),XB(c)
      • B(c);::P(B),XR(b)
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