MESON Chess Problem Database
Problem Display
PID: 277070 (8/3B1p2/1pPp1pn1/1pbk1P1K/1p1n3R/6NN/P5P1/B3RQ2 w - - 0 1)
Boersma, Kornelis Thomas
Probleemblad, 1954
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Sc2
- 2.Qf3#
- 1...Se2
- 2.Qf3#
- 1...Sb3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sxf5
- 2.Qf3#
- 1...Sxc6
- 2.Qf3#
- 1...Se6
- 2.Qf3#
- 1...Sf4+
- 2.Sxf4#
- 1...Sxh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...Sc2
- Tries
- 1.Sh1?
- 1...Sf4+
- 2.Sxf4#
- 1...Sxf5
- 2.Qf3#
- 1...Sxc6
- 2.Qf3#
- 1...Sxh4
- 2.Sf4#
- 1...Sc2
- 2.Qf3#
- 1...Se2
- 2.Qf3#
- 1...Sb3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Se6
- 2.Qf3#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...b3!
- 1...Sf4+
- 1.Bb2?
- 1...Sf4+
- 2.Sxf4#
- 1...Sxf5
- 2.Qf3#
- 1...Sxc6
- 2.Qf3#
- 1...Sxh4
- 2.Sf4#
- 1...Sc2
- 2.Qf3#
- 1...Se2
- 2.Qf3#
- 1...Sb3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Se6
- 2.Qf3#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...b3!
- 1...Sf4+
- 1.Be8?
- 1...Sf4+
- 2.Sxf4#
- 1...Sxf5
- 2.Qf3#
- 1...Sxc6
- 2.Bxf7#
- 2.Qf3#
- 1...Sxh4
- 2.Sf4#
- 1...Sc2
- 2.Qf3#
- 1...Se2
- 2.Qf3#
- 1...Sb3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Se6
- 2.Qf3#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...b3!
- 1...Sf4+
- 1.Re3?
- 1...Sf4+
- 2.Sxf4#
- 1...Sxf5
- 2.Qf3#
- 1...Sxc6
- 2.Qf3#
- 1...Sxh4
- 2.Sf4#
- 1...Sc2
- 2.Qf3#
- 1...Se2
- 2.Qf3#
- 1...Sb3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Se6
- 2.Qf3#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...b3!
- 1...Sf4+
- 1.Rg4?
- 1...Sf4+
- 2.Sxf4#
- 1...Sxf5
- 2.Qf3#
- 1...Sxc6
- 2.Qf3#
- 1...Sc2
- 2.Qf3#
- 1...Se2
- 2.Qf3#
- 1...Sb3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Se6
- 2.Qf3#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...b3!
- 1...Sf4+
- 1.Qd3?
- 1...Sf4+
- 2.Sxf4#
- 1...Sxh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...b3!
- 1...Sf4+
- 1.Qxb5?
- threat
- 2.Rxd4#
- 1...Sf4+
- 2.Sxf4#
- 1...Sxf5
- 2.Qc4#
- 1...Sxc6
- 2.Bxc6#
- 2.Qc4#
- 2.Qxc6#
- 1...Sxh4
- 2.Sf4#
- 1...Sc2
- 2.Qc4#
- 1...Se2
- 2.Qc4#
- 1...Sb3
- 2.Qc4#
- 1...Sf3
- 2.Qc4#
- 1...Se6
- 2.Qc4#
- 1...Sxb5!
- threat
- 1.Qf3+?
- 1...Kc4
- 2.Rc1#
- 2.Qb3#
- 1...Sxf3!
- 1...Kc4
- 1.fxg6?
- threat
- 2.Sf4#
- 1...Se2
- 2.Qf3#
- 2.Qf5#
- 1...Se6
- 2.Qf3#
- 2.Qf5#
- 1...fxg6+!
- threat
- 1.c7?
- 1...Sf4+
- 2.Sxf4#
- 1...Sxf5
- 2.Qf3#
- 1...Sxh4
- 2.Sf4#
- 1...Sc2
- 2.Qf3#
- 1...Se2
- 2.Qf3#
- 1...Sb3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sc6
- 2.Qf3#
- 1...Se6
- 2.Qf3#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...b3!
- 1...Sf4+
- 1.Sh1?
- Keys
- 1.Se2!
- 1...Sf4+
- 2.Sexf4#
- 1...Kc4
- 2.Sc3#
- 1...Ke5
- 2.Sef4#
- 1...Sxe2
- 2.Qf3#
- 1...Sxf5
- 2.Qf3#
- 1...Sxc6
- 2.Qf3#
- 1...Sxh4
- 2.Sef4#
- 1...b3
- 2.Sc3#
- 1...Sc2
- 2.Qf3#
- 1...Sb3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Se6
- 2.Qf3#
- 1...Se5
- 2.Sef4#
- 1...Se7
- 2.Sef4#
- 1...Sf8
- 2.Sef4#
- 1...Sh8
- 2.Sef4#
- 1...Sf4+
- 1.Se2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(b);N_GUARD,XP(I)::QAB(C)
- S(b);N_GUARD,XP(K)::QAB(C)
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(i);N_GUARD,XR(H)::S(G)
- S(i);N_GUARD::S(G)
- Tries
- Try
- S(F);
- Vars
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(b);N_GUARD,XP(I)::QAB(C)
- S(b);N_GUARD,XP(K)::QAB(C)
- S(i);N_GUARD,XR(H)::S(G)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(i);N_GUARD::S(G)
- Refutation
- P(a);
- Try
- B(A);
- Vars
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(b);N_GUARD,XP(I)::QAB(C)
- S(b);N_GUARD,XP(K)::QAB(C)
- S(i);N_GUARD,XR(H)::S(G)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(i);N_GUARD::S(G)
- Refutation
- P(a);
- Try
- B(L);
- Vars
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(b);N_GUARD,XP(I)::QAB(C)
- S(i);N_GUARD,XR(H)::S(G)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(i);N_GUARD::S(G)
- Refutation
- P(a);
- Try
- R(B);
- Vars
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(b);N_GUARD,XP(I)::QAB(C)
- S(b);N_GUARD,XP(K)::QAB(C)
- S(i);N_GUARD,XR(H)::S(G)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(i);N_GUARD::S(G)
- Refutation
- P(a);
- Try
- R(H);
- Vars
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(b);N_GUARD,XP(I)::QAB(C)
- S(b);N_GUARD,XP(K)::QAB(C)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(i);N_GUARD::S(G)
- Refutation
- P(a);
- Try
- Q(C);P_PINS(b)
- Vars
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(i);N_GUARD,XR(H)::S(G)
- S(i);N_GUARD::S(G)
- Refutation
- P(a);
- Try
- Q(C);P_PINB(d),XP(c)
- Threat
- R1(H),XS(b)
- Vars
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(b);XP(I)::QAB1(C)
- S(i);N_GUARD,XR(H)::S(G)
- S(b);::QAB1(C)
- Refutation
- S(b);N_SPINB(d),XQ(C)
- Try
- Q(C);CHECK
- Refutation
- S(b);XQ(C)
- Try
- P(I);XS(i)
- Threat
- S(G)
- Refutation
- P(j);CHECK,XP(I)
- Try
- P(K);
- Vars
- S(i);CHECK,N_GUARD::S(G),XS(i)
- S(b);N_GUARD,XP(I)::QAB(C)
- S(i);N_GUARD,XR(H)::S(G)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(i);N_GUARD::S(G)
- Refutation
- P(a);
- Try
- Actual
- S(F);
- Vars
- S(i);CHECK,N_GUARD::S(F),XS(i)
- K(e);P_SPINS(b),S_CUTP(a),S_FLIGHT::QAB(C)+S(F)
- K(e);P-FLIGHT,P_SPINS(b),S_CUTS(i)::R(B)+S(F)
- S(b);N_GUARD,XS(F)::QAB(C)
- S(b);N_GUARD,XP(I)::QAB(C)
- S(b);N_GUARD,XP(K)::QAB(C)
- S(i);N_GUARD,XR(H)::S(F)
- P(a);N_GUARD::S(F)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(i);N_GUARD::S(F)
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).