MESON Chess Problem Database
Problem Display
PID: 266274 (8/1K5B/p3p3/3k4/1Q2p1N1/2P5/1p2N3/1bqr4 w - - 0 1)
Schaffner, Gerold
Schweizerische Schachzeitung, 2019
#2
6 + 8
SOLUTION
- SOUND
- Sets
- 1...Qd2
- 2.c4#
- 1...Qe3
- 2.c4#
- 1...Qf4
- 2.Sxf4#
- 2.c4#
- 1...Qg5
- 2.c4#
- 1...Qh6
- 2.c4#
- 1...Qc2
- 2.Sf4#
- 1...Qxc3
- 2.Sxc3#
- 2.Sf4#
- 1...Re1
- 2.Qd4#
- 1...Rf1
- 2.Qd4#
- 1...Rg1
- 2.Qd4#
- 1...Rh1
- 2.Qd4#
- 1...Rd2
- 2.Sf4#
- 1...Rd3
- 2.Bxe4#
- 1...Rd4
- 2.Qxd4#
- 1...Ba2
- 2.Bxe4#
- 1...Bc2
- 2.c4#
- 1...Bd3
- 2.Qd4#
- 1...e3
- 2.Sf4#
- 1...e5
- 2.Bg8#
- 1...Qd2
- Tries
- 1.Kb6?
- threat
- 2.Qc5#
- 1...Qxc3
- 2.Sxc3#
- 2.Sf4#
- 1...e5
- 2.Bg8#
- 1...Qe3+!
- threat
- 1.Bg6?
- 1...Qxc3
- 2.Sxc3#
- 2.Sf4#
- 1...e5
- 2.Bf7#
- 1...Qd2
- 2.c4#
- 1...Qe3
- 2.c4#
- 1...Qf4
- 2.Sxf4#
- 2.c4#
- 1...Qg5
- 2.c4#
- 1...Qh6
- 2.c4#
- 1...Qc2
- 2.Sf4#
- 1...Re1
- 2.Qd4#
- 1...Rf1
- 2.Qd4#
- 1...Rg1
- 2.Qd4#
- 1...Rh1
- 2.Qd4#
- 1...Rd2
- 2.Sf4#
- 1...Rd3
- 2.Bxe4#
- 1...Rd4
- 2.Qxd4#
- 1...Ba2
- 2.Bxe4#
- 1...Bc2
- 2.c4#
- 1...Bd3
- 2.Qd4#
- 1...e3
- 2.Sf4#
- 1...a5!
- 1...Qxc3
- 1.Kb6?
- Keys
- 1.Kc7!
- 1...Qf4+
- 2.Sxf4#
- 1...Qxc3+
- 2.Sxc3#
- 1...e5
- 2.Bg8#
- 1...Qd2
- 2.c4#
- 1...Qe3
- 2.c4#
- 1...Qg5
- 2.c4#
- 1...Qh6
- 2.c4#
- 1...Qc2
- 2.Sf4#
- 1...Re1
- 2.Qd4#
- 1...Rf1
- 2.Qd4#
- 1...Rg1
- 2.Qd4#
- 1...Rh1
- 2.Qd4#
- 1...Rd2
- 2.Sf4#
- 1...Rd3
- 2.Bxe4#
- 1...Rd4
- 2.Qxd4#
- 1...Ba2
- 2.Bxe4#
- 1...Bc2
- 2.c4#
- 1...Bd3
- 2.Qd4#
- 1...e3
- 2.Sf4#
- 1...a5
- 2.Qb5#
- 1...Qf4+
- 1.Kc7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(b);N_GUARD::P(B)
- Q(b);N_GUARD::S(A)
- R(c);N_GUARD::QAR1(C)
- R(c);S_CUTQ(b)::S(A)
- R(c);S_CUTB(a)::B(F),XP(e)
- R(c);N_GUARD::QAR1(C),XR(c)
- B(a);N_GUARD::B(F),XP(e)
- B(a);S_CUTQ(b)::P(B)
- B(a);S_CUTR(c)::QAR1(C)
- P(e);S_CUTQ(b)::S(A)
- P(h);OGATEB::B(F)
- Tries
- Try
- K(E);P-FLIGHT
- Threat
- QAR1(C)
- Vars
- P(h);OGATEB::B(F)
- Refutation
- Q(b);CHECK
- Try
- B(F);
- Vars
- P(h);OGATEB::B(F)
- Q(b);N_GUARD::P(B)
- Q(b);N_GUARD::S(A)
- R(c);N_GUARD::QAR1(C)
- R(c);S_CUTQ(b)::S(A)
- R(c);S_CUTB(a)::B(F),XP(e)
- R(c);N_GUARD::QAR1(C),XR(c)
- B(a);N_GUARD::B(F),XP(e)
- B(a);S_CUTQ(b)::P(B)
- B(a);S_CUTR(c)::QAR1(C)
- P(e);S_CUTQ(b)::S(A)
- Refutation
- P(g);
- Try
- Actual
- K(E);P-FLIGHT,P_SPINP(B)
- Vars
- Q(b);CHECK,N_GUARD,N_PINP(B)::S(A),XQ(b)
- Q(b);CHECK,XP(B)::S(A),XQ(b)
- P(h);OGATEB::B(F)
- Q(b);N_GUARD,N_PINP(B)::P(B)
- Q(b);N_GUARD::S(A)
- R(c);N_GUARD::QAR1(C)
- R(c);S_CUTQ(b)::S(A)
- R(c);S_CUTB(a)::B(F),XP(e)
- R(c);N_GUARD::QAR1(C),XR(c)
- B(a);N_GUARD::B(F),XP(e)
- B(a);N_PINP(B),S_CUTQ(b)::P(B)
- B(a);S_CUTR(c)::QAR1(C)
- P(e);S_CUTQ(b)::S(A)
- P(g);N_GUARD::QAR2(C)
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).