MESON Chess Problem Database

Problem Display
PID: 235241 (4r2q/2p1N1pb/7b/8/R3p3/1n1kpQNr/2R2P2/3K2n1 w - - 0 1)

Heyl, Peter

Schach, 2007

4r2q/2p1N1pb/7b/8/R3p3/1n1kpQNr/2R2P2/3K2n1

#2

7 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg8
      • 2.Qxe4#
    • 1...Se2
      • 2.Qxe2#
    • 1...g5
      • 2.Qxe3#
    • 1...g6
      • 2.Qxe4#
  • Tries
    • 1.Se2?
      • threat
        • 2.Rc3#
      • 1...Sxe2
        • 2.Qxe2#
      • 1...g6
        • 2.Qxe4#
      • 1...g5!
    • 1.Sd5?
      • threat
        • 2.Rc3#
      • 1...g5
        • 2.Qxe3#
      • 1...Se2
        • 2.Qxe2#
      • 1...g6!
    • 1.Rd2+?
      • 1...Kc3
        • 2.Sd5#
      • 1...Sxd2!
  • Keys
    • 1.Rac4!
      • threat
        • 2.R2c3#
      • 1...g5
        • 2.Qxe3#
      • 1...Se2
        • 2.Qxe2#
      • 1...g6
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(j);N_GUARD::QAB1(D),XP(f)
    • S(a);N_GUARD::QAB1(D),XS(a)
    • P(i);S_CUTB(g)::QAR1(D),XP(d)
    • P(i);S_CUTB(j)::QAB1(D),XP(f)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(B)
      • Vars
        • S(a);OGATE,XS(E)::QAB1(D),XS(a)
        • P(i);S_CUTB(j)::QAB1(D),XP(f)
      • Refutation
        • P(i);
    • Try
      • S(G);
      • Threat
        • R1(B)
      • Vars
        • P(i);S_CUTB(g)::QAR1(D),XP(d)
        • S(a);N_GUARD::QAB1(D),XS(a)
      • Refutation
        • P(i);
    • Try
      • R(B);CHECK
      • Vars
        • K(c);P-FLIGHT::S(G)
      • Refutation
        • S(b);XR(B)
  • Actual
    • R(F);
    • Threat
      • R1(B)
    • Vars
      • P(i);S_CUTB(g)::QAR1(D),XP(d)
      • S(a);N_GUARD::QAB1(D),XS(a)
      • P(i);S_CUTB(j)::QAB1(D),XP(f)
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