MESON Chess Problem Database

Problem Display
PID: 222642 (8/2p1Q3/4p3/1p3b2/Nr2kPp1/1P6/4Kb2/5RB1 w - - 0 1)

Crusemann, Richard

English Mechanic and World of Science, 1883

(First published on Fri Oct 12 1883)

8/2p1Q3/4p3/1p3b2/Nr2kPp1/1P6/4Kb2/5RB1

#2

7 + 8

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg3
      • 2.Sc3#
    • 1...Bh4
      • 2.Sc3#
    • 1...Bc5
      • 2.Sc3#
    • 1...Bb6
      • 2.Sc3#
    • 1...Ba7
      • 2.Sc3#
    • 1...e5
      • 2.Qxe5#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Qxb4#
      • 1...Kxf4!
    • 1.Qxb4+?
      • 1...Bd4
        • 2.Sc3#
        • 2.Qxd4#
      • 1...Kd5!
    • 1.Qd6?
      • threat
        • 2.Sc3#
        • 2.Qe5#
      • 1...Rxb3
        • 2.Qe5#
      • 1...Rxa4
        • 2.Qe5#
      • 1...bxa4
        • 2.Qe5#
      • 1...Bg6
        • 2.Qe5#
      • 1...Bh7
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Rc4
        • 2.Qe5#
      • 1...Be1
        • 2.Sc5#
        • 2.Qe5#
        • 2.Qd3#
        • 2.Qc6#
      • 1...Bd4
        • 2.Qc6#
      • 1...cxd6!
    • 1.Qxe6+?
      • 1...Kd4
        • 2.Bxf2#
        • 2.Qe5#
      • 1...Kxf4
        • 2.Qe3#
      • 1...Bxe6!
    • 1.Qxc7?
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Bd4
        • 2.Qc6#
        • 2.Qb7#
      • 1...Kd5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qe5#
      • 1...Kxf4
        • 2.Qe3#
      • 1...Bxc5
        • 2.Sc3#
      • 1...Bd4
        • 2.Qc6#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);::S(E)
    • P(g);OGATE::QAR1(G),XP(g)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);N_SPINP(g),P-FLIGHT,P_SPINB(a)::QAR2(G),XR(b)
      • Refutation
        • K(c);N_SPINP(g),P-FLIGHT,P_SPINB(a),XP(F)
    • Try
      • Q(G);CHECK,N_PINP(g),XR(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);N_PINP(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(D)::QAR1(G)
        • R(b);XS(E)::QAR1(G)
        • P(e);XS(E)::QAR1(G)
        • B(f);::QAR1(G)
        • P(g);::QAR1(G),XP(g)
        • R(b);::QAR1(G)
        • B(a);::QAB(G)
      • Refutation
        • P(h);XQ(G)
    • Try
      • Q(G);CHECK,XP(g)
      • Vars
        • K(c);OGATE,P-FLIGHT,P_SPINB(a),XP(F)::QAB1(G)
      • Refutation
        • B(f);XQ(G)
    • Try
      • Q(G);N_PINP(g),XP(h)
      • Threat
        • QAR1(G)
      • Vars
        • K(c);P-FLIGHT,P_SPINB(a)::QAB1(G)
        • P(g);::QAR1(G),XP(g)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(G);N_PINP(g)
    • Threat
      • QAR1(G)
    • Vars
      • K(c);P-FLIGHT,P_SPINB(a),XP(F)::QAB1(G)
      • B(a);XQ(G)::S(E)
      • B(a);::QAB(G)
      • P(g);::QAR1(G),XP(g)
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