Meson Chess Problem Database

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Problem Display

PID: 247890 (8/8/8/8/3pR1K1/3Qb3/5k1B/8 w - - 0 1)

Jonsson, Christer

Extra Prize, Blikeng-80 JT, 1993-1994

8/8/8/8/3pR1K1/3Qb3/5k1B/8

#2

4 + 3

14867	BCPS Library	2021
5454	Near Snap	2021

SOLUTION

SOUND
Sets
- 1...Ke1
  - 2.Bg3#
- 1...Bc1
  - 2.Qe2#
  - 2.Qf3#
- 1...Bd2
  - 2.Qe2#
  - 2.Qf3#
- 1...Bf4
  - 2.Qe2#
  - 2.Qf3#
- 1...Bg5
  - 2.Qe2#
  - 2.Qf3#
- 1...Bh6
  - 2.Qe2#
  - 2.Qf3#
Tries
- 1.Re5?
  - 1...Ke1
    - 2.Bg3#
  - 1...Bc1
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bd2
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bf4
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bg5
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bh6
    - 2.Qe2#
    - 2.Qf3#
  - 1...Kg2!
- 1.Re6?
  - 1...Ke1
    - 2.Bg3#
  - 1...Bc1
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bd2
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bf4
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bg5
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bh6
    - 2.Qe2#
    - 2.Qf3#
  - 1...Kg2!
- 1.Re7?
  - 1...Ke1
    - 2.Bg3#
  - 1...Bc1
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bd2
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bf4
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bg5
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bh6
    - 2.Qe2#
    - 2.Qf3#
  - 1...Kg2!
- 1.Re8?
  - 1...Ke1
    - 2.Bg3#
  - 1...Bc1
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bd2
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bf4
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bg5
    - 2.Qe2#
    - 2.Qf3#
  - 1...Bh6
    - 2.Qe2#
    - 2.Qf3#
  - 1...Kg2!
- 1.Qxe3+?
  - 1...Kf1
    - 2.Qg1#
    - 2.Qe2#
    - 2.Qf3#
  - 1...Kg2
    - 2.Qg1#
  - 1...dxe3!
Keys
- 1.Kh3!
  - 1...Ke1
    - 2.Bg3#
  - 1...Kf3
    - 2.Rf4#
  - 1...Bc1
    - 2.Qe2#
  - 1...Bd2
    - 2.Qe2#
  - 1...Bf4
    - 2.Qe2#
  - 1...Bg5
    - 2.Qe2#
  - 1...Bh6
    - 2.Qe2#

Anticipated by 237282(1990)

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
Sets
- K(a);P_SPINB(b),S_FLIGHT::B(A)
Tries
- Try
  - R(C);
  - Vars
    - K(a);P_SPINB(b),S_FLIGHT::B(A)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - R(C);
  - Vars
    - K(a);P_SPINB(b),S_FLIGHT::B(A)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - R(C);
  - Vars
    - K(a);P_SPINB(b),S_FLIGHT::B(A)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - R(C);
  - Vars
    - K(a);P_SPINB(b),S_FLIGHT::B(A)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - Q(B);CHECK,XB(b)
  - Vars
    - K(a);OGATE,P-FLIGHT::QAR1(B)
  - Refutation
    - P(c);XQ(B)
Actual
- K(D);S_FLIGHT
- Vars
  - K(a);P_SPINB(b),S_FLIGHT::B(A)
  - K(a);P-FLIGHT,P_SPINB(b)::R1(C)
  - B(b);::QAR1(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).