MESON Chess Problem Database

Problem Display
PID: 38137 (3k4/r2P4/b1Q2K2/1B6/8/8/8/8 w - - 0 1)

Hannemann, Knud Harald

Nationaltidende, 1924

3k4/r2P4/b1Q2K2/1B6/8/8/8/8

#2

4 + 3

881 The Australasian Chess Review 1929
2012 Miniature Chess Problems from Many Countries 1981
145 StrateGems 2006
136 Problem Observer 2007
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.Qc8#
    • 1...Rxd7
      • 2.Qxd7#
    • 1...Ra8
      • 2.Qb6#
    • 1...Bxb5
      • 2.Qc8#
    • 1...Bb7
      • 2.Qb6#
    • 1...Bc8
      • 2.Qxc8#
      • 2.dxc8Q#
      • 2.dxc8R#
  • Tries
    • 1.Ke6?
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Bxb5
        • 2.Qc8#
      • 1...Rb7
        • 2.Qc8#
      • 1...Ra8
        • 2.Qb6#
      • 1...Bb7
        • 2.Qb6#
      • 1...Bc8
        • 2.Qxc8#
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rc7!
    • 1.Ba4?
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Rb7
        • 2.Qc8#
      • 1...Ra8
        • 2.Qb6#
      • 1...Bf1
        • 2.Qc8#
      • 1...Be2
        • 2.Qc8#
      • 1...Bd3
        • 2.Qc8#
      • 1...Bc4
        • 2.Qc8#
      • 1...Bb5
        • 2.Qc8#
      • 1...Bb7
        • 2.Qb6#
      • 1...Bc8
        • 2.Qxc8#
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rc7!
    • 1.Qa8+?
      • 1...Kc7
        • 2.d8Q#
      • 1...Bc8
        • 2.Qxc8#
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rxa8!
    • 1.Qc5?
      • 1...Bxb5
        • 2.Qc8#
      • 1...Rc7
        • 2.Qe7#
        • 2.Qf8#
      • 1...Rb7
        • 2.Qc8#
      • 1...Ra8
        • 2.Qb6#
      • 1...Bb7
        • 2.Qb6#
      • 1...Bc8
        • 2.Qxc8#
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rxd7!
  • Keys
    • 1.Kf7!
      • 1...Rxd7+
        • 2.Qxd7#
      • 1...Bxb5
        • 2.Qc8#
      • 1...Rb7
        • 2.Qc8#
      • 1...Rc7
        • 2.Qf6#
      • 1...Ra8
        • 2.Qb6#
      • 1...Bb7
        • 2.Qb6#
      • 1...Bc8
        • 2.Qxc8#

This anticipates 11242(1937), 51744(1971)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);S_CUTB(a)::QAR1(B)
    • R(b);OGATE,XP(D)::QAR1(B),XR(b)
    • R(b);N_GUARD::QAB(B)
    • B(a);N_GUARD,XB(A)::QAR1(B)
    • B(a);S_CUTR(b)::QAB(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • R(b);OGATE,XP(D)::QAR1(B),XR(b)
        • B(a);N_GUARD,XB(A)::QAR1(B)
        • R(b);S_CUTB(a)::QAR1(B)
        • R(b);N_GUARD::QAB(B)
        • B(a);S_CUTR(b)::QAB(B)
      • Refutation
        • R(b);
    • Try
      • B(A);
      • Vars
        • R(b);OGATE,XP(D)::QAR1(B),XR(b)
        • R(b);S_CUTB(a)::QAR1(B)
        • R(b);N_GUARD::QAB(B)
        • B(a);N_GUARD::QAR1(B)
        • B(a);S_CUTR(b)::QAB(B)
      • Refutation
        • R(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::P=Q
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);
      • Vars
        • B(a);N_GUARD,XB(A)::QAR1(B)
        • R(b);S_CUTB(a)::QAR1(B)
        • R(b);N_GUARD::QAB(B)
        • B(a);S_CUTR(b)::QAB(B)
      • Refutation
        • R(b);XP(D)
  • Actual
    • K(C);P-FLIGHT,P_SPINP(D)
    • Vars
      • R(b);CHECK,OGATE,XP(D)::QAR1(B),XR(b)
      • B(a);N_GUARD,XB(A)::QAR1(B)
      • R(b);S_CUTB(a)::QAR1(B)
      • R(b);SBLOCK::QAB(B)
      • R(b);N_GUARD,N_PINP(D)::QAB(B)
      • B(a);N_PINP(D),S_CUTR(b)::QAB(B)
      • B(a);N_GUARD::QAR1(B),XB(a)
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