MESON Chess Problem Database

Problem Display
PID: 149139 (8/3p2p1/8/K2k1B2/pB1p1RN1/1r2p3/Q7/2R2b2 w - - 0 1)

Dehler, Ernst Georg

Szasz Sakksz., 1926

8/3p2p1/8/K2k1B2/pB1p1RN1/1r2p3/Q7/2R2b2

#2

7 + 8

15148 Sadier Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qxg2#
    • 1...Bc4
      • 2.Qg2#
    • 1...Bb5
      • 2.Qg2#
    • 1...Ba6
      • 2.Qg2#
  • Tries
    • 1.Be7?
      • threat
        • 2.Rc5#
      • 1...Bc4
        • 2.Qg2#
      • 1...d6!
    • 1.Bf8?
      • threat
        • 2.Rc5#
      • 1...Bc4
        • 2.Qg2#
      • 1...d6!
    • 1.Bg6?
      • threat
        • 2.Bf7#
      • 1...Ke6
        • 2.Bf7#
      • 1...Bc4!
    • 1.Bh7?
      • threat
        • 2.Bg8#
      • 1...Ke6
        • 2.Bg8#
      • 1...Bc4!
    • 1.Qxb3+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...axb3!
    • 1.Qc2?
      • threat
        • 2.Qe4#
        • 2.Qc5#
      • 1...Rxb4
        • 2.Qc5#
      • 1...Bc4
        • 2.Qe4#
        • 2.Qg2#
        • 2.Qxc4#
      • 1...Rd3
        • 2.Qc4#
        • 2.Qc5#
      • 1...Bg2
        • 2.Qxg2#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Bd3
        • 2.Qc5#
      • 1...d3
        • 2.Qc4#
        • 2.Qc5#
      • 1...d6
        • 2.Qe4#
        • 2.Qc6#
      • 1...Rc3!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Rfxd4#
      • 1...Kxc4
        • 2.Sxe3#
      • 1...Bxc4
        • 2.Qg2#
      • 1...Rd3
        • 2.Rc3#
      • 1...d3
        • 2.Rfd4#

This is a version of 149158

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAB(B),XB(a)
    • B(a);N_GUARD,N_SPINR(b)::QAB(B)
    • B(a);N_GUARD::QAB(B)
  • Tries
    • Try
      • B(C);
      • Threat
        • R1(A)
      • Vars
        • B(a);N_GUARD,N_SPINR(b)::QAB(B)
      • Refutation
        • P(g);
    • Try
      • B(C);
      • Threat
        • R1(A)
      • Vars
        • B(a);N_GUARD,N_SPINR(b)::QAB(B)
      • Refutation
        • P(g);
    • Try
      • B(G);
      • Threat
        • B(G)
      • Vars
        • K(f);S_FLIGHT::B(G)
      • Refutation
        • B(a);N_SPINR(b)
    • Try
      • B(G);
      • Threat
        • B(G)
      • Vars
        • K(f);S_FLIGHT::B(G)
      • Refutation
        • B(a);N_SPINR(b)
    • Try
      • Q(B);CHECK,XR(b)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(B),XB(a)
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);N_PINR(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XB(C)::QAR1(B)
        • B(a);::QAR1(B)
      • Refutation
        • R(b);
  • Actual
    • R(A);N_PINR(b)
    • Threat
      • R1(D),XP(e)
    • Vars
      • K(f);P_SPINP(e),P_SPINR(b),S_FLIGHT,XR(A)::S(E),XP(c)
      • B(a);N_GUARD,SBLOCK,XR(A)::QAB(B)
      • R(b);OGATEB::QAB(B)+R(A)
      • P(e);::R1(D)
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