MESON Chess Problem Database

Problem Display
PID: 149415 (3K4/2p1Q2n/2P2p2/pN1kN1R1/1p6/4R3/3r3n/2q2B2 w - - 0 1)

Albrecht, Hermann

Dortmunder Zeitung, 1938

(First published on Sat Jan 15 1938)

3K4/2p1Q2n/2P2p2/pN1kN1R1/1p6/4R3/3r3n/2q2B2

#2

8 + 9

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Bc4#
    • 1...Qa3
      • 2.Bc4#
    • 1...Qa1
      • 2.Bc4#
    • 1...Qb1
      • 2.Bc4#
    • 1...Qd1
      • 2.Bc4#
    • 1...Qe1
      • 2.Bc4#
    • 1...Qc4
      • 2.Bxc4#
    • 1...Qc5
      • 2.Qf7#
    • 1...Rd4
      • 2.Sxc7#
  • Tries
    • 1.Kxc7?
      • threat
        • 2.Qd6#
      • 1...Qc5
        • 2.Qf7#
      • 1...Qxc6+!
    • 1.Sd3+?
      • 1...Kc4
        • 2.Qe6#
        • 2.Qf7#
      • 1...Kxc6
        • 2.Qxc7#
      • 1...fxg5
        • 2.Qe4#
        • 2.Qe6#
      • 1...f5
        • 2.Qe4#
        • 2.Qe6#
      • 1...Sxg5!
    • 1.Bg2+?
      • 1...Sf3
        • 2.Bxf3#
      • 1...Rxg2!
    • 1.Rd3+?
      • 1...Ke4
        • 2.Sg6#
      • 1...Rxd3!
    • 1.Qe6+?
      • 1...Kc5+
        • 2.Sd7#
      • 1...Kxe6+!
  • Keys
    • 1.Qxc7!
      • threat
        • 2.Qd6#
      • 1...Kc5+
        • 2.Sd7#
      • 1...Ke6+
        • 2.Sd3#
      • 1...Qxc6
        • 2.Qxc6#
      • 1...Qc5
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::B(A)
    • Q(a);N_GUARD::B(A),XQ(a)
    • Q(a);SBLOCK::QAB(G)
    • R(b);SBLOCK::S(C),XP(h)
  • Tries
    • Try
      • K(H);P_SPINP(F),S_FLIGHT,XP(h)
      • Threat
        • QAR1(G)
      • Vars
        • Q(a);SBLOCK::QAB(G)
      • Refutation
        • Q(a);CHECK,XP(F)
    • Try
      • S(D);CHECK
      • Vars
        • K(f);P_PINS(D),S_FLIGHT,XP(F)::QAR1(G),XP(h)
      • Refutation
        • S(i);XR(E)
    • Try
      • B(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(A),XS(c)
      • Refutation
        • R(b);XB(A)
    • Try
      • R(B);CHECK
      • Vars
        • K(f);P_PINR(B),S_FLIGHT::QAR(G)+S(D)
      • Refutation
        • R(b);XR(B)
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);CHECK,P-FLIGHT::R(E)+S(D),DCHECK
      • Refutation
        • K(f);CHECK,S_FLIGHT,XQ(G)
  • Actual
    • Q(G);XP(h)
    • Threat
      • QAR1(G)
    • Vars
      • K(f);CHECK,P-FLIGHT::R(E)+S(D),DCHECK
      • K(f);CHECK,S_FLIGHT::R(B)+S(D)
      • Q(a);OGATE,XP(F)::QAB1(G),XQ(a)
      • Q(a);SBLOCK::QAB(G)
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