MESON Chess Problem Database
Problem Display
PID: 50671 (b1BR2K1/6p1/4N1p1/6Q1/3P4/2br3k/q4P1B/1r2n2R w - - 0 1)
Hartong, Jan
Correspondence Chess, 1964
#2
9 + 9
| 5227 | Schaak..., maar raak! | 1969 |
SOLUTION
- SOUND
- Sets
- 1...Qxe6+
- 2.Bxe6#
- 1...Qa1
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sxg7#
- 2.Sf8#
- 1...Qb2
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sxg7#
- 2.Sf8#
- 1...Qc2
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sxg7#
- 2.Sf8#
- 1...Qd2
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sxg7#
- 2.Sf8#
- 1...Qe2
- 2.Sf4#
- 1...Qxf2
- 2.Sf4#
- 1...Qa3
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sxg7#
- 2.Sf8#
- 1...Qa4
- 2.Sf4#
- 1...Qa5
- 2.Sf4#
- 2.Sc5#
- 1...Qa6
- 2.Sf4#
- 1...Qa7
- 2.Sf4#
- 2.Sc7#
- 1...Rb3
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sxg7#
- 2.Sf8#
- 1...Rb7
- 2.Bg1#
- 2.Bf4#
- 2.Be5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Rd1
- 2.Qg3#
- 1...Rd2
- 2.Qg3#
- 1...Rf3
- 2.Bg1#
- 2.Bf4#
- 2.Be5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Rg3
- 2.Qxg3#
- 1...Rxd4
- 2.Qg3#
- 1...Bf3
- 2.Qg3#
- 1...Sg2
- 2.Bg1#
- 1...Sf3
- 2.Qg3#
- 1...Qxe6+
- Tries
- 1.Kxg7?
- threat
- 2.Sf4#
- 2.Rh8#
- 1...Qa7+
- 2.Sc7#
- 1...Rb7+
- 2.Bc7#
- 1...Qxe6
- 2.Bxe6#
- 2.Rh8#
- 1...Qxf2
- 2.Sf4#
- 1...Rxd4
- 2.Sf4#
- 2.Qg3#
- 1...Bxh1
- 2.Rh8#
- 1...Rg3
- 2.Sf4#
- 2.Qxg3#
- 1...Qe2
- 2.Sf4#
- 1...Bf3
- 2.Sf4#
- 2.Qg3#
- 1...Sg2
- 2.Sf4#
- 2.Bg1#
- 1...Sf3
- 2.Sf4#
- 2.Qg3#
- 1...Bxd4+!
- threat
- 1.Kh7?
- threat
- 2.Sf4#
- 1...Qxe6
- 2.Bxe6#
- 1...Bxh1!
- threat
- 1.Kh8?
- threat
- 2.Sf4#
- 1...Qxe6
- 2.Bxe6#
- 1...Bxh1!
- threat
- 1.f3?
- threat
- 2.Qg3#
- 2.Qg4#
- 1...Qxe6+
- 2.Bxe6#
- 1...Qxh2
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sxg7#
- 2.Sf8#
- 2.Qg4#
- 1...Rxd4
- 2.Qg3#
- 1...Bxf3
- 2.Qg3#
- 1...Sxf3
- 2.Qg3#
- 1...Qf2
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sxg7#
- 2.Sf8#
- 2.Qg4#
- 1...Qg2
- 2.Sf4#
- 1...Rxf3!
- threat
- 1.Kxg7?
- Keys
- 1.Kf7!
- threat
- 2.Rh8#
- 1...Qxe6+
- 2.Bxe6#
- 1...Qxf2+
- 2.Sf4#
- 1...Qa7+
- 2.Sc7#
- 1...Rb7+
- 2.Bc7#
- 1...Rf3+
- 2.Bf4#
- 1...Rxd4
- 2.Qg3#
- 1...Rg3
- 2.Qxg3#
- 1...Qe2
- 2.Sf4#
- 1...Bf3
- 2.Qg3#
- 1...Sg2
- 2.Bg1#
- 1...Sf3
- 2.Qg3#
- threat
- 1.Kf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::B(G),XQ(c)
- Q(c);N_PINS(F)::B(G)+S(F),DCHECK
- Q(c);N_PINS(F),XP(B)::B(G)+S(F),DCHECK
- Q(c);N_PINS(F),SBLOCK::B(G)+S(F),DCHECK
- R(e);N_GUARD::QAR1(E)
- R(e);N_GUARD::QAR1(E),XR(e)
- R(e);N_GUARD,XP(D)::QAR1(E)
- B(i);S_CUTR(e)::QAR1(E)
- S(b);S_CUTB(i)::R(A)+B(C)
- S(b);S_CUTR(e)::QAR1(E)
- Tries
- Try
- K(I);N_SPINS(F),P-FLIGHT,P_SPINP(D),XP(h)
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,N_GUARD::B(G)+S(F)
- R(a);CHECK,S_CUTB(i)::R(A)+B(C)
- Q(c);XP(B)::B(G)+S(F),DCHECK
- B(i);XR(A)::R(H)
- Q(c);::B(G)+S(F),DCHECK
- Refutation
- B(d);CHECK,XP(D)
- Try
- K(I);N_SPINS(F),S_FLIGHT
- Threat
- B(G)+S(F),DCHECK
- Vars
- Q(c);OGATE,P_SPINQ(c),XS(F)::B(G),XQ(c)
- Refutation
- B(i);XR(A)
- Try
- K(I);N_SPINS(F),P-FLIGHT
- Threat
- B(G)+S(F),DCHECK
- Vars
- Q(c);OGATE,P_SPINQ(c),XS(F)::B(G),XQ(c)
- Refutation
- B(i);XR(A)
- Try
- P(B);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::B(G),XQ(c)
- R(e);XP(D)::QAR1(E)
- B(i);XP(B)::QAR1(E)
- S(b);XP(B)::QAR1(E)
- Q(c);N_PINS(F)::B(G)+S(F),DCHECK
- Refutation
- R(e);XP(B)
- Try
- Actual
- K(I);S_FLIGHT
- Threat
- R(H)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::B(G),XQ(c)
- Q(c);CHECK,N_PINS(F),XP(B)::B(G)+S(F),DCHECK
- Q(c);CHECK,N_PINS(F)::B(G)+S(F)
- R(a);CHECK,S_CUTB(i)::R(A)+B(C)
- R(e);CHECK,S_CUTB(i)::R(A)+B(C)
- R(e);N_GUARD,XP(D)::QAR1(E)
- R(e);N_GUARD::QAR1(E),XR(e)
- Q(c);N_PINS(F)::B(G)+S(F),DCHECK
- B(i);S_CUTR(e)::QAR1(E)
- S(b);S_CUTB(i)::R(A)+B(C)
- S(b);S_CUTR(e)::QAR1(E)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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