Meson Chess Problem Database

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Problem Display

PID: 179558 (5K2/R1N1RP2/1pk2Pp1/1p3np1/1B3pQ1/5PP1/8/8 w - - 0 1)

Morse, Christopher Jeremy

Busmen's Chess Review, 1969

5K2/R1N1RP2/1pk2Pp1/1p3np1/1B3pQ1/5PP1/8/8

#2

10 + 7

SOLUTION

SOUND
Sets
- 1...Se3
  - 2.Qe6#
  - 2.Qd7#
- 1...Sxg3
  - 2.Qe6#
  - 2.Qd7#
- 1...Sd4
  - 2.Qd7#
- 1...Sh4
  - 2.Qe6#
  - 2.Qd7#
- 1...Sd6
  - 2.Qd7#
- 1...Sh6
  - 2.Qe6#
  - 2.Qd7#
- 1...Sxe7
  - 2.Qe6#
- 1...Sg7
  - 2.Qd7#
- 1...fxg3
  - 2.Qe4#
Tries
- 1.Ba3?
  - 1...Sxg3
    - 2.Qe6#
    - 2.Qd7#
  - 1...Sxe7
    - 2.Qe6#
  - 1...fxg3
    - 2.Qe4#
  - 1...Sd6
    - 2.Qd7#
  - 1...Se3
    - 2.Qe6#
    - 2.Qd7#
  - 1...Sd4
    - 2.Qd7#
  - 1...Sh4
    - 2.Qe6#
    - 2.Qd7#
  - 1...Sh6
    - 2.Qe6#
    - 2.Qd7#
  - 1...Sg7
    - 2.Qd7#
  - 1...b4!
- 1.Re6+?
  - 1...Sd6
    - 2.Rxd6#
  - 1...Kd7!
- 1.Qxf4?
  - threat
    - 2.Qc1#
    - 2.Qe4#
  - 1...Sxg3
    - 2.Qc1#
    - 2.Qd6#
  - 1...Sxe7
    - 2.Qd6#
  - 1...Sd6
    - 2.Qxd6#
  - 1...Se3
    - 2.Qd6#
  - 1...Sd4
    - 2.Qd6#
    - 2.Qe4#
  - 1...gxf4!
- 1.gxf4?
  - 1...Sxe7
    - 2.Qe6#
  - 1...Sd6
    - 2.Qd7#
  - 1...Se3
    - 2.Qe6#
    - 2.Qd7#
  - 1...Sg3
    - 2.Qe6#
    - 2.Qd7#
  - 1...Sd4
    - 2.Qd7#
  - 1...Sh4
    - 2.Qe6#
    - 2.Qd7#
  - 1...Sh6
    - 2.Qe6#
    - 2.Qd7#
  - 1...Sg7
    - 2.Qd7#
  - 1...gxf4!
Keys
- 1.Qxg5!
  - 1...Sxg3
    - 2.Qxb5#
    - 2.Qd5#
  - 1...Sxe7
    - 2.Qxb5#
  - 1...fxg3
    - 2.Qc1#
  - 1...Sd6
    - 2.Qd5#
  - 1...Se3
    - 2.Qxb5#
  - 1...Sd4
    - 2.Qd5#
  - 1...Sh4
    - 2.Qxb5#
    - 2.Qd5#
  - 1...Sh6
    - 2.Qxb5#
    - 2.Qd5#
  - 1...Sg7
    - 2.Qxb5#
    - 2.Qd5#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 1
Sets
- S(c);OGATE::QAB1(D)
- S(c);OGATE,XR(H)::QAR2(D)
- P(a);OGATE,XP(B)::QAB(D)
Tries
- Try
  - B(C);
  - Vars
    - S(c);OGATE,XR(H)::QAR2(D)
    - P(a);OGATE,XP(B)::QAB(D)
    - S(c);OGATE::QAB1(D)
  - Refutation
    - P(b);
- Try
  - R(H);CHECK
  - Vars
    - S(c);N_GUARD,P_SPINS(c)::R1(H),XS(c)
  - Refutation
    - K(f);S_FLIGHT
- Try
  - Q(D);XP(a)
  - Threat
    - DUALS(2)
  - Vars
    - S(c);N_GUARD,XR(H)::QAR1(D)
    - S(c);N_GUARD::QAR1(D),XS(c)
    - S(c);N_GUARD::QAR1(D)
  - Refutation
    - P(d);XQ(D)
- Try
  - P(B);XP(a)
  - Vars
    - S(c);OGATE,XR(H)::QAR2(D)
    - S(c);OGATE::QAB1(D)
  - Refutation
    - P(d);XP(B)
Actual
- Q(D);XP(d)
- Vars
  - S(c);OGATE,XR(H)::QAB1(D),XP(b)
  - P(a);OGATE,XP(B)::QAR(D)
  - S(c);OGATE::QAB1(D)
  - S(c);OGATE::QAB1(D),XP(b)

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).