MESON Chess Problem Database
Problem Display
PID: 211404 (1N3n2/8/1pP5/1pkB1N2/2pR1pp1/r3B3/1r5p/1R2Q2K w - - 0 1)
Groeneveld, Cornelis
Prins, Hendrik
The Problemist, 1986
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rba2
- 2.Qb4#
- 1...Rc2
- 2.Qb4#
- 1...Re2
- 2.Qb4#
- 1...Rf2
- 2.Qb4#
- 1...Rg2
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rb3
- 2.Sa6#
- 1...Rc3
- 2.Sa6#
- 1...Rd3
- 2.Sa6#
- 1...Rxe3
- 2.Sa6#
- 1...Ra6
- 2.Sxa6#
- 1...Se6
- 2.Sd7#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...f3
- 2.Rd3#
- 1...Rba2
- Tries
- 1.Bxf4?
- threat
- 2.Bd6#
- 2.Qe7#
- 1...Rxb1
- 2.Bd6#
- 1...Ra7
- 2.Bd6#
- 1...Re2
- 2.Bd6#
- 2.Qb4#
- 1...Re3
- 2.Sa6#
- 2.Bd6#
- 1...Se6
- 2.Sd7#
- 2.Bd6#
- 1...Sg6
- 2.Sd7#
- 2.Bd6#
- 1...b4!
- threat
- 1.Bf3?
- threat
- 2.Rd5#
- 1...Rc3
- 2.Sa6#
- 1...c3
- 2.Rxf4#
- 1...gxf3!
- threat
- 1.Be4?
- threat
- 2.Rd5#
- 1...Rc3
- 2.Sa6#
- 1...c3!
- threat
- 1.Be6?
- threat
- 2.Rxc4#
- 2.Rd5#
- 1...Rxe3
- 2.Rd5#
- 1...fxe3
- 2.Rd5#
- 1...Rc3
- 2.Rxc4#
- 1...b4
- 2.Rd5#
- 1...c3
- 2.Rc4#
- 2.Rxf4#
- 1...Sxe6!
- threat
- 1.Bf7?
- threat
- 2.Rxc4#
- 2.Rd5#
- 1...Rxe3
- 2.Rd5#
- 1...fxe3
- 2.Rd5#
- 1...Rc3
- 2.Rxc4#
- 1...b4
- 2.Rd5#
- 1...c3
- 2.Rc4#
- 2.Rxf4#
- 1...Se6!
- threat
- 1.Bg8?
- threat
- 2.Rxc4#
- 2.Rd5#
- 1...Rxe3
- 2.Rd5#
- 1...fxe3
- 2.Rd5#
- 1...Rc3
- 2.Rxc4#
- 1...b4
- 2.Rd5#
- 1...c3
- 2.Rc4#
- 2.Rxf4#
- 1...Se6!
- threat
- 1.Rdd1+?
- 1...Rxe3
- 2.Sa6#
- 1...fxe3!
- 1...Rxe3
- 1.Bxf4?
- Keys
- 1.Bg2!
- threat
- 2.Rd5#
- 1...Rxg2
- 2.Qb4#
- 1...Rc3
- 2.Sa6#
- 1...c3
- 2.Rxf4#
- 1...f3
- 2.Rd3#
- threat
- 1.Bg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 13
- Sets
- R(a);N_GUARD::QAB1(B)
- R(a);N_GUARD::QAB1(B),XR(a)
- R(c);N_GUARD::S(I)
- R(c);N_GUARD,XB(D)::S(I)
- R(c);N_GUARD::S(I),XR(c)
- S(j);N_GUARD::S(I)
- S(j);N_GUARD::S(I),XS(j)
- P(e);N_GUARD::B(D)+R(E)
- Tries
- Try
- B(D);XP(e)
- Threat
- DUALS(2)
- Vars
- R(a);P_PINQ(B),XR(A)::B(D)
- R(c);::B(D)
- Refutation
- P(g);
- Try
- B(F);
- Threat
- B(D)+R(E),DCHECK
- Vars
- R(c);N_GUARD::S(I)
- P(d);S_CUTR(c)::B(D)+R(E),XP(e)
- Refutation
- P(f);XB(F)
- Try
- B(F);
- Threat
- B(D)+R(E),DCHECK
- Vars
- R(c);N_GUARD::S(I)
- Refutation
- P(d);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(c);XB(D)::R1(E)
- P(e);XB(D)::R1(E)
- R(c);::B(D)+R(E),DCHECK,XP(d)
- P(g);::B(D)+R(E),DCHECK
- Refutation
- S(j);XB(F)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(c);XB(D)::R1(E)
- P(e);XB(D)::R1(E)
- R(c);::B(D)+R(E),DCHECK,XP(d)
- P(g);::B(D)+R(E),DCHECK
- Refutation
- S(j);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(c);XB(D)::R1(E)
- P(e);XB(D)::R1(E)
- R(c);::B(D)+R(E),DCHECK,XP(d)
- P(g);::B(D)+R(E),DCHECK
- Refutation
- S(j);
- Try
- R(E);CHECK
- Vars
- R(c);XB(D)::S(I)
- Refutation
- P(e);XB(D)
- Try
- Actual
- B(F);
- Threat
- B(D)+R(E),DCHECK
- Vars
- R(a);N_GUARD,XB(F)::QAB1(B)
- R(c);N_GUARD::S(I)
- P(d);S_CUTR(c)::B(D)+R(E),XP(e)
- P(e);N_GUARD::B(D)+R(E)
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