MESON Chess Problem Database

Problem Display
PID: 979 (3R4/4pNpB/2p1k1p1/p5P1/1PKp2Pn/4q3/5Q2/4R3 w - - 0 1)

Murarasu, Ion

The Problemist Supplement, 1995

3R4/4pNpB/2p1k1p1/p5P1/1PKp2Pn/4q3/5Q2/4R3

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2+
      • 2.Rxe2#
    • 1...Qe4
      • 2.Rxe4#
    • 1...Qe5
      • 2.Rxe5#
    • 1...d3
      • 2.Rxe3#
  • Tries
    • 1.Kc5?
      • threat
        • 2.Qa2#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...d3+
        • 2.Rxe3#
      • 1...Qe2
        • 2.Rxe2#
      • 1...axb4!
    • 1.Rd5?
      • threat
        • 2.Sd8#
      • 1...Qe2+
        • 2.Rxe2#
      • 1...cxd5+!
    • 1.Qxe3+?
      • 1...Kxf7
        • 2.Bg8#
        • 2.Qe6#
        • 2.Qxe7#
      • 1...dxe3!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Kc5#
      • 1...Kxf7
        • 2.Bg8#
      • 1...axb4
        • 2.Kxb4#
      • 1...Qe5
        • 2.Kd3#
      • 1...d3
        • 2.Kc3#
      • 1...c5
        • 2.Kxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);CHECK,OGATEB::R(A),XQ(a)
    • Q(a);OGATE::R(A),XQ(a)
    • Q(a);OGATE::R1(A),XQ(a)
    • P(b);N_GUARD::R(A),XQ(a)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAB(B)
      • Vars
        • Q(a);CHECK,OGATE::R1(A),XQ(a)
        • P(b);CHECK,N_GUARD::R(A),XQ(a)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • P(d);XP(C)
    • Try
      • R(I);
      • Threat
        • S(G)
      • Vars
        • Q(a);CHECK,OGATEB::R(A),XQ(a)
      • Refutation
        • P(e);CHECK,XR(I)
    • Try
      • Q(B);CHECK,XQ(a)
      • Refutation
        • P(b);P_SPINP(b),XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+K(D)
    • Vars
      • K(f);N_SPINQ(a),OGATEB,S_FLIGHT,XS(G)::B(H)
      • P(d);XP(C)::QAB(B)+K(D),XP(d)
      • Q(a);::QAB(B)+K(D)
      • P(b);::QAB(B)+K(D)
      • P(e);::QAB(B)+K(D),XP(e)
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