MESON Chess Problem Database

Problem Display
PID: 257594 (1q1R4/4NKb1/3pNp2/4k3/1np1p1pn/4r3/Q7/4B3 w - - 0 1)

Suwe, Hanspeter

Troll, 2021

(First published on Thu Jan 7 2021)

1q1R4/4NKb1/3pNp2/4k3/1np1p1pn/4r3/Q7/4B3

#2

6 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Bc3#
      • 2.Bg3#
    • 1...Rc3
      • 2.Bxc3#
    • 1...Rg3
      • 2.Bxg3#
    • 1...Sd3
      • 2.Bc3#
    • 1...Sf3
      • 2.Bg3#
  • Tries
    • 1.Qa1+?
      • 1...Rc3
        • 2.Bxc3#
        • 2.Bg3#
        • 2.Qxc3#
      • 1...c3!
    • 1.Qb2+?
      • 1...Rc3
        • 2.Bxc3#
        • 2.Bg3#
        • 2.Qxc3#
      • 1...c3!
    • 1.Qd2?
      • threat
        • 2.Qd4#
      • 1...Qa7
        • 2.Qxd6#
      • 1...Rd3
        • 2.Qf4#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sd3
        • 2.Qc3#
      • 1...Sc6
        • 2.Qd5#
      • 1...Sf3
        • 2.Bg3#
      • 1...Sf5
        • 2.Sg6#
      • 1...Qb6!
    • 1.Qh2+?
      • 1...Rg3
        • 2.Bc3#
        • 2.Bxg3#
        • 2.Qxg3#
      • 1...g3!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qf4#
      • 1...Rf3
        • 2.Qd4#
      • 1...Bh6
        • 2.Qxf6#
      • 1...Sd3
        • 2.Bc3#
      • 1...Sd5
        • 2.Sc6#
      • 1...Sg2
        • 2.Qf5#
      • 1...Sf3
        • 2.Qg3#
      • 1...Sg6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::B(A),XR(a)
    • S(b);S_CUTR(a)::B(A)
    • S(f);S_CUTR(a)::B(A)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(k);N_GUARD,P_PINS(D)::QAB1(B),XP(h)
        • R(a);OGATE::QAB1(B)
        • S(b);N_GUARD::QAR1(B)
        • S(b);S_CUTR(a)::QAB(B)
        • S(f);S_CUTR(a)::B(A)
        • S(f);N_GUARD,SBLOCK::S(D)
      • Refutation
        • Q(k);
    • Try
      • Q(B);CHECK
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • R(a);OGATE::QAB1(B)
      • B(j);N_GUARD::QAB1(B),XP(i)
      • S(b);S_CUTR(a)::B(A)
      • S(b);N_GUARD,SBLOCK::S(D)
      • S(f);N_GUARD::QAR1(B)
      • S(f);S_CUTR(a)::QAB(B)
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